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Eliminasi
2x + 5y = 8
x + 5y = - 2 -
x = 10
Substitusi
2x + 5y = 8
2.10 + 5y = 8
20 + 5y = 8
5y = 8-20
5y = -12
y = -12 / 5
y = -2,4
Nomor 3
Eliminasi
2x - y = 5
x - y = -3 -
x = 8
Substitusi
x - y = -3
8 - y = -3
y = 8 + 4
y = 11