Question

Resolva:

$<var>\left \{ {{4x+y=2} \atop {3x+2y=7}} \right.</var>$

Answer 1

4x+y=2             -2
3x+2y=7

-8x-2y=-4
3x+2y=7

5x=3
x=3/5

4x+y=2
4.3/5+y=2
12/5+y=2
y=2-12/5                  mmc de 1,5 = 5
y=10/5 - 12/5
y=-2/5