Question

2x+y=12&x-y=9 solve the x

Answer 1

heya mate here's your answer-

hope it helps...!!!!!

Answer 2

2x+y=12......(1)

x-y=9

x-9=y......(2)

on putting equation 2 in 1 we get

2x+x-9=12

3x=12+9

3x=21

x=7

then

y=7-9= -2

hence x=7 and y= -2