Question

3x+2y =12
Maka Fungsi f(x) = 15 adalah

Answer 1

3x+2y = 12
2y = 12-3x
y = (12-3x)/2
y = f(x) = (12-3x)/2
15 = (12-3x)/2
30 = 12-3x
3x = 12-30
3x = -18
x = -6

semoga membantu :)

Answer 2

3x+2y=12
2y=12-3x
y=6-3/2x
f(x)=6-3/2.x
15=(12-3x)/2
30=12-3x
3x=-18
x=-6