nilai 5x + 3y adalah.. A. 16 B. 14 C. 8 D. -4

¾x - ½y = 4
3x -2y = 16 ( X2)

x + 5y/2 = -1
2x + 5y = -2 (X3)

6x-4y = 32
6x+15y = -6
=========== --
-19y = 38
y = -2

2x + 5(-2) = -2
2x = -2+10
x = 8/2
x = 4

5x + 3y = 5(4) + 3(-2) = 20-6 = 14

jawaban : b