Question

calcule o sistema do primeiro grau x + y = 13x = Y + 3

Answer 1

x + y = 13
x = Y + 3

x + y = 13
y + 3 + y = 13
2y = 13 - 3
2y = 10
y = 10/2
y = 5

x = Y + 3
x = 5 + 3
x = 8

Resposta:
x = 8
y = 5