4x+y=1
y=1-4x
6x+2y= -2
6x+2*(1-4x)= -2
6x+2-8x= -2
6x-8x= -2-2
-2x= -4 Divide with -2
x= -4/-2
x=2
y=1-4x
y=1-4*2
y=1-8
y= -7
Proof:
6x+2y= -2
6*2+2*(-7)= -2
12+(-14)= -2
12-14= -2
-2= -2
4x+y=1
4*2+(-7)=1
8-7=1
1=1
6x + 2y = -2
4x + y = 1
1 answer