Question

resoluçao do sistema 2x+y=-3 e x-3y=-26 pelo metodo de substituiçao

Answer 1

2x+y=-3

x-3y=-26

x=-26+3y

2(-26+3y)+y=-3

-52+6y+y=-3

7y=-3+52

7y=49

y=49/7

y=7

x=26+3.7

x=26+21

x=47