Question

[y+2x=-1 |3y + 4x=-7​

Answer 1

y+2x= -1⇒y= -1-2x= -1-2·2= -1-4= -5

3y+4x= -7

3(-1-2x)+4x= -7

-3-6x+4x= -7

-3-2x= -7

-3+7=2x

4=2x

2=x

x=2

y= -5