Question 220760: 8x-y=20
-5x+y=-8
Answer by RAY100(1637)   (Show Source):
You can put this solution on YOUR website! (1) 8x -y=20
(2) -5x +y =-8
.
(1)+(2) 3x +12
.
x=4,,,,,,,subst in (1)
.
8(4) -y =20
.
-y = 20-32= -12
.
y =12
.
.
checking,,,(4, 12),,,,(1) 8(4) -(12) =20,,,,,,ok
.
(2) -5(4) +(12) =-8,,,,-20 +12 =-8,,,,ok
.
| |
|
