Question

método de igualacion
x + 3y = 13
2x - 2y = 10​

Answer 1

(x + 3y = 13) 2

(2x - 2y = 10) 3

2x + 6y = 26

6x - 6y = 30

8x = 56

x = 56 ÷ 8

x = 7

2 (7) - 2y = 10

14 - 2y = 10

-2y = 10 - 14

-2y = 4

y = 4 ÷ -2

y = -2