4x-y=63 3y+x=6

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问题 4x-y=63 3y+x=6

选项

答案 Line up the like terms in both equations: 4x-y=63 x+3y=6 Multiply the top equation by 3 and add the equations: 12x-3y=189 x+3y=6 Note that the y terms cancel out: 13x=195 x=15 Now substitute 15 for x in one of the equations. x+3y=6 15+3y=6 3y=-9 y=-3

解析

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本试题收录于： GRE QUANTITATIVE题库GRE分类

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4x-y=63 3y+x=6

GRE QUANTITATIVE

GRE

Wesubstitutefish______meatseveraltimesaweek.

Traditionally,universitieshavecarriedouttwomainactivities;researchandteaching.Manyexpertswouldarguethatboththes

Traditionally,universitieshavecarriedouttwomainactivities;researchandteaching.Manyexpertswouldarguethatboththes

The______goalofthebookistohelpbridgethegapbetweenresearchandteaching,particularlythegapbetweenresearchersand

Heneverwrotetohisfather______hewasinneedofmoney.

AstheTitanicwassinkingandwomenandchildrenclimbedintolifeboats,themusiciansfromtheship’sbandstoodandplayed.T

Thereisnodoubtthatadults,andevenhighlyeducatedadults,varygreatlyinthespeedandefficiencyoftheirreading.Some

Thankstothemeansofmoderntransportationandcommunication,theworldisgettingsmaller.Thewholeworldcommunityappears

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