Question

resolva o sistema
2×+5y=13 -2×+5y=23

Answer 1

2.x+5.y = 13

-2.x+5.y = 23

10y = 36
y = 36/10
y = 3,6


2.x+5.3,6 = 13
2.x + 18 = 13
2.x = 13-18
2.x = -5
x = -5/2
x = -2,5



Resposta===== Y = 3,6    X = -2,5