Question

x+y=2 e 2x-y=13 qual o valor de x e y?​

Answer 1

Resposta:

x+y=2

x= 2-y

2x-y=13

2(2-y) - y =13

4-2y-y=13

-3y=13-4

-3y=9

y=9/-3

y=-3

x=2-y

x=2-(-3)

x=2+3

x=5

S={(5,-3)}