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x + y = 8
x - y = 2 -
2y = 6
y = 3
x + y = 8
x + 3 = 8
x = 5
Jadi,
x = 5
y = 3
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2).
3x + 2y = 12
3x - y = 3 -
3y = 9
y = 3
3x + 2y = 12
3x + 6 = 12
3x = 6
x = 2
Jadi,
x = 2
y = 3