4x + 6y = 12 3x + 5y = 21 berapa nilai x dan y?

nilai x = 1/3 dan y = 4

4x+6y=12 x3
3x+5y=21 x4

12x+18y=36
12x+20y=84
_________ -
-2y= -48
y = 24
subtitusi
4x+6y=12
4x+144=12
4x = -132
x = - 33

semoga membantu