Answered

x + 2y = 4
2x + y = 4

Sagot :

Nestheaviz
x + 2y = 4
2y = 4 - x
y = 2 - x

2x + y = 4
2x + 2 - x = 4
2x - x = 4-2
x=2

y = 2 - x
y = 2 - 2
y = 0

2x + y = 4
2(2) + 0 = 4
4 + 0 = 4
4=4