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x - 2y = 0
2x + y = 5

Sagot :

x - 2y = 0
x = 2y

2x+ y = 5
Replace x
2(2y) + y = 5
4y + y = 5
5 y = 5
y = 5/5 = 1

x - 2y = 0
x - 2(1) = 0
x - 2 = 0
x = 2

x=2 and y=1