Question

Calcule X e y sabendo que x/8= y/3 e x- y = 85

Answer 1

x - y = 85
x = 85 + y

(85 + y) / 8 = y/3
3(85+y) = 8y
255 + 3y = 8y
255 = 8y - 3y
255 = 5y
255/5 = y
51 = y

x - 51 = 85
x = 85 + 51
x = 136

Answer 2

3x=8y
x-y=85. • (-3)

3x-8y=0
-3x+3y = -255

-5y=-255
y=51


x-51=85
x=51+85
x=136