Question

x - 5y = 8

- 7x + 8 = 25

me `pueden ayudar porfavor :)

Answer 1

x - 5y = 8
-7x + 8y = 25

x = 8 + 5y

-7(8 + 5y) + 8y = 25
-56 - 35y + 8y = 25
-27y = 81
y = -3

x = 8+5(-3)
x = 8-15
x = -7

Answer 2

x - 5y = 8
-7x +8y =25

7(x - 5y)= 8(7)
- 7x +8 y= 25
-----------------------
7x - 35y= 56
-7x+8y = 25
-------------------
0 -27 y = 81

-27y= 81
y= - 81/27
y= -3

x - 5 y = 8
x= 8 + 5y
x= 8 + 5(-3)
x= 8 - 15
x= - 7


Comprobación
x - 5y = 8
-7 - 5(-3) = 8
-7 + 15 = 8
8 = 8