metodo de reduccion:
3x-4y=8
x+2y=16
x+2y=16 (2)
=
2x+4y=32
5x=40 = x=40/5 = x=8
3(8)-4y=8 = 24-4y=8 = -4y=8-24 = -4y=-16 y=-16/-4 = y=4
x=8 y=4
4y=-3x+8+4
4y=3x+12
y=4x+4
2y=x+16
y=1/2x+8
