diketahui 6x+2y=14 dan x-6y=15 nilai dari 4x-3y =

6x + 2y = 14 → (x3)
x - 6y = 15 → (x1)

18x + 6y = 42
x - 6y = 15
------------------- (+)
19x = 57
x = 57/19
x = 3

x - 6y = 15
3 - 6y = 15
-6y = 15 - 3
-6y = 12
y = 12/-6
y = -2

→ 4x - 3y
= 4(3) - 3(-2)
= 12 + 6
= 18