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2x + 3y = 11 (x3)
___________
6x + 10 y = 14
6x + 9y = 33
___________ (-)
y = -19
3x + 5y = 7
3x + 5(-19) = 7
3x - 95 = 7
3x = 102
x = 34
sehingga x + 5 y = 34 + (5*-19)= 34-95 = -61