Penyelesaian dari persamaan linier 2 variabel . 2X - y = 2 X + y = 7

2x - y = 2
x + y = 7

x + y = 7
x = 7 - y

2x - y = 2
2(7 - y) - y = 2
14 - 2y - y = 2
14 - 3y = 2
- 3y = 2 - 14
- 3y = - 12
y = 4

x = 7 - y
x = 7 - 4
x = 3

Maaf Kalau Salah

2x-y=2
x+y=7
————+
3x=9
x=9/3
x=3


2x+y=7
2(3)-y=2
-y=2/6
-y=1/3
y=-1/3