解一元一次方程练习题及答案及知识点

relationship,establishedequivalentrelationship14,andsubject:applicationproblem(4)--scoresandpercentageapplicationproblemreviewcontentoverviewanswersscores,andpercentageapplicationproblemofkeyis:accordingtomeaning,(1)determinestandardvolume(units1)(2)findassociatevolumeratecorrespondstorelationship,Thenin-linesolution.CategoryfractionmultiplicationwordproblemscoreDivisionapplicationsengineeringproblemproblemXV,asubject:reviewofthemeasurementoftheamountofcapacity,measurementandunitsofmeasurementofcommonunitsofmeasurementandtheirsignificanceinrate1,currency,length,area,volume,unitsize,volume,weightandrate.(Omitted)2,commonlyusedtimeunitsandtheirrelationships.(Slightly)withameasurementunitsZhijianofofpoly1,andofmethod2,andpolymethod3,andofmethodandpolymethodofrelationshipmeasurementdistanceofmethod1,andtoolmeasurement2,andestimates16,andsubject:geometrypreliminaryknowledge(1)--lineandanglereviewcontentline,andsegment,andRay,andvertical,andparallel,andangleangleofclassification(slightly)17,andsubject:geometrypreliminaryknowledge(2)--planegraphicsreviewcontenttriangle,andedgesshaped,andround,andfanaxisymmetricgraphicsperimeterandareacombinationgraphicsofareasubject:Preliminaryknowledge(3)-reviewofsolidcontentcategory1-dshapesaredividedinto:cylinderandcone2,columnisdividedinto:cuboid,square3,coneconeofthefeaturesofcuboidsandcubesrelationshipbetweencharacteristicsofcircularconeisslightlysolidsurfaceareaandvolume1,size2,table...和和平与发展是当今世界发展的主题，中国作为屹立在世界东方的大国，要担负起重要的责任。从“亚太自由贸易区”到“亚投行”、“一带一路”，再到G20峰会，都体现出中国一个负责任的大国形象。解一元一次方程一、慧眼识金（每小题3分，共24分）1．某数的15等于4与这个数的45的差,那么这个数是【】．(A)4(B)-4(C)5(D)-52．若32113xx，则4x的值为【】．(A)８(B)-８(C)-４(D)４３．若ab，则①1133ab；②1134ab；③3344ab；④3131ab中，正确的有【】．(A)１个(B)２个(C)３个(D)４个４．下列方程中，解是1x的是【】．(A)2(2)12x(B)2(1)4x(C)1115(21)xx(D)2(1)2x５．下列方程中，变形正确的是【】．3443xx(A)由得232xx(B)由3=得552xx(C)由2-得5252xx(D)由得6．对于“xyab”，下列移项正确的是【】．(A)xbya(B)xayb(C)axyb(D)axby7．某同学在解关于x的方程513ax时，误将x看作x，得到方程的解为2x，则原方程的解为【】．(A)3x(B)0x(C)2x(D)1x８．小丽的年龄乘以3再减去3是18，那么小丽现在的年龄为【】．(A)7岁(B)8岁(C)16岁(D)32岁二、画龙点睛（每小题3分，共24分）1．在3510xxx，，中，是方程432xx的解．２．若m是3221xx的解，则3010m的值是．３．当x时，代数式1(25)2x与1(92)3x的差为１０．４．如果154m与14m互为相反数，则m的值为．relationship,establishedequivalentrelationship14,andsubject:applicationproblem(4)--scoresandpercentageapplicationproblemreviewcontentoverviewanswersscores,andpercentageapplicationproblemofkeyis:accordingtomeaning,(1)determinestandardvolume(units1)(2)findassociatevolumeratecorrespondstorelationship,Thenin-linesolution.CategoryfractionmultiplicationwordproblemscoreDivisionapplicationsengineeringproblemproblemXV,asubject:reviewofthemeasurementoftheamountofcapacity,measurementandunitsofmeasurementofcommonunitsofmeasurementandtheirsignificanceinrate1,currency,length,area,volume,unitsize,volume,weightandrate.(Omitted)2,commonlyusedtimeunitsandtheirrelationships.(Slightly)withameasurementunitsZhijianofofpoly1,andofmethod2,andpolymethod3,andofmethodandpolymethodofrelationshipmeasurementdistanceofmethod1,andtoolmeasurement2,andestimates16,andsubject:geometrypreliminaryknowledge(1)--lineandanglereviewcontentline,andsegment,andRay,andvertical,andparallel,andangleangleofclassification(slightly)17,andsubject:geometrypreliminaryknowledge(2)--planegraphicsreviewcontenttriangle,andedgesshaped,andround,andfanaxisymmetricgraphicsperimeterandareacombinationgraphicsofareasubject:Preliminaryknowledge(3)-reviewofsolidcontentcategory1-dshapesaredividedinto:cylinderandcone2,columnisdividedinto:cuboid,square3,coneconeofthefeaturesofcuboidsandcubesrelationshipbetweencharacteristicsofcircularconeisslightlysolidsurfaceareaandvolume1,size2,table...和和平与发展是当今世界发展的主题，中国作为屹立在世界东方的大国，要担负起重要的责任。从“亚太自由贸易区”到“亚投行”、“一带一路”，再到G20峰会，都体现出中国一个负责任的大国形象。５．已知方程1(2)60aax是关于x的一元一次方程，则a．６．如果3123xx成立，则x的正数解为．７．已知384xxa的解满足20x，则1a．８．若32224kxk是关于x的一元一次方程，则k，x．三、考考你的基本功（本大题共40分）１．解下列方程（每小题3分，共12分）（1）76226xx；（2）4352xx；（3）453xx；（4）3735yy．2．（8分）2x是方程40ax的解，检验3x是不是方程2534axxa的解．3．（10分）已知236mxm是关于x的一元一次方程，试求代数式2008(3)x的值．4．（10分）如果3346xyz，求346xyz的值．四、同步大闯关（本大题12分）方程4231xmx和方程3241xmx的解相同，求m的值和方程的解．（下列题目供各地根据实际情况选用）关于x的方程23mxnx中，mn、是常数，请你给mn、赋值，并解此时关于x的方程．relationship,establishedequivalentrelationship14,andsubject:applicationproblem(4)--scoresandpercentageapplicationproblemreviewcontentoverviewanswersscores,andpercentageapplicationproblemofkeyis:accordingtomeaning,(1)determinestandardvolume(units1)(2)findassociatevolumeratecorrespondstorelationship,Thenin-linesolution.CategoryfractionmultiplicationwordproblemscoreDivisionapplicationsengineeringproblemproblemXV,asubject:reviewofthemeasurementoftheamountofcapacity,measurementandunitsofmeasurementofcommonunitsofmeasurementandtheirsignificanceinrate1,currency,length,area,volume,unitsize,volume,weightandrate.(Omitted)2,commonlyusedtimeunitsandtheirrelationships.(Slightly)withameasurementunitsZhijianofofpoly1,andofmethod2,andpolymethod3,andofmethodandpolymethodofrelationshipmeasurementdistanceofmethod