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x = 10 + 2y
3x + 2y = 2
3(10 + 2y) + 2y = 2
30 + 6y + 2y = 2
6y + 2y = 2 - 30
8y = -28
y = -3,5
x - 2y = 10
x - 2(-3,5) = 10
x - (-7) = 10
x + 7 = 10
x = 10 + 7
x = 3
Himpunan penyelesaian = {3; 3,5}