Question

2x+2y=6 3x+4y=12 metodo de sustitucion

Answer 1

.2x+2y=6
2(x+y)=6
x+y=3
x=3-y

.3x+4y=12
3(3-y)+4y=12
9-3y+4y =12
9+y=12
y=3

....y=3
....x=0