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3x - 5y = 16
3x - 5(2x +1) = 16
3x - 10x - 5 = 16
-7x = 21
x = 21/-7 = -3
y = 2(x) + 1
= 2(-3)+1
= -5
Him. Penyelesai= (x,y) = ( -3,-5)