Question

Tentukan HP dengan substitusi
6x - y = 14
3x + 4y = -2

Answer 1

6x - y = 14
y = 6x - 14
3x + 4y = -2
3x + 4(6x - 14) = -2
3x + 24x - 56 = -2
27x = -2 + 56 = 54
x = 54 ÷ 27 = 2
6x - y = 14
6.2 - y = 14
-y = 14 - 12
-y = 2
y = -2
HP = {2,-2}