Question

Como resolvo esse sistema?

5x+3y=-4
7x-2y=13​

Answer 1

5x+3y=-4. (x2). 10x+6y=-8

7x-2y=13. (x3). 21x-6y=39

10x+21x+6y-6y=-8+39=31

31x=31

31/31=1

5.1+3y=-4
3y=-4-5
3y=-9
y=-9/3=-3
S{x=1. y=-3