Question

resolva o sistema ×-y=10 2×+3y=10

Answer 1

Olá!

x - y = 10
2x + 3y = 10

x = 10 + y

2.(10 + y) + 3y = 10
20 + 2y + 3y = 10
5y = 10 - 20
5y = -10
y = -10 ÷ 5
y = -2

2x + 3.(-2) = 10
2x - 6 = 10
2x = 16
x = 8

Logo:

y = -2
x = 8