How do you solve the following system?: #x -9y =15, x -2y = -5#

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Answer 1 · 2018-07-02T19:25:07

#x=-20/7#, #y=-75/7#

System of linear equations,

#x-9y=15\ .......(1)#

#x-2y=-5\ .......(2)#

Subtracting (2) from (1) we get

#x-9y-(x-2y)=15-(-5)#

#-7y=20#

#y=-20/7#

Setting #y=-20/7# in (1), we get

#x=15+9y=15+9(-20/7)=-75/7#