Question

10 х - 3y=13
2 х - 7 y = 9​

Answer 1

Respuesta:

10x - 3y = 13

2x - 7y = 9

10x - 3y = 13

(-5) 2x - 7y = 9

10x - 3y = 13

-10x + 35y = -45

32y = -32

y = -1

10x - 3y = 13

10x - 3(-1) = 13

10x - (-3) = 13

10x + 3 = 13

10x = 10

x = 1

x = 1

y = -1