Question

Ax+4y=10 dan x+2y=9 mohon di bantu yaaaa...

Answer 1

Ax + 4y = 10
x + 2y = 9 |×2|
=> ax + 4y = 10
2x + 4y = 18 -
_________
(a-2)x = -8
x = -8/(a-2)
ax + 4y = 10
a(-8/(a-2)) + 4y = 10
-8a / (a-2) + 4ay - 8y / (a-2) = 10
-8a + 4ay - 8y = 10
4 (-2a + ay - 2y) = 10
-2a + ay - 2y = 2,5
-2a + (a-2)y = 2,5
(a-2)y = 2,5 + 2a
y = 2,5 + 2a / (a-2)