Question

Método de igualación:

15x - 8y = 80
5x - 3y = 25

Answer 1

Método de igualación:
15x - 8y = 80
5x - 3y = 25

Despejar: (x)
x = 80 + 8y / 15
x = 25 + 3y / 5

Igualar:
x = x

80 + 8y / 15 = 25 + 3y / 5
5(80 + 8y)/15 = 25 + 3y
(80 + 8y)/3 = 25 + 3y
80 + 8y = 3(25 + 3y)
80 + 8y = 75 + 9y
9y - 8y = 80 - 75
y = 5


Reemplazar : y=5
5x - 3y = 25
5x - 3(5) = 25
5x -15 = 25
5x = 25 + 15
5x = 40
x = 40/5
x = 8

Answer 2

Explicacióp

15x-8y=16
5x-3y=5