Question

7x-5y=34 -9x-7y=10 sistema de ecuaciones

Answer 1

(1)    7x - 5y = 34
(2)  - 9x - 7y = 10

x  = 34 + 5y/7
x = 10 + 7y/-9

34 + 5y/7 = 10 + 7y/-9
-9(34 + 5y) = 7(10 + 7y)
-306 - 45y = 70 + 49y
-45y - 49y = 70 + 306
-94y = 376
y = 376/-94
y = -4


x  = 34 + 5y/7
x = 34 + 5(-4)/7
x =34 - 20/7
x = 14/7
x = 2

Respuesta:
x = 2
y = -4