Question

Determine X e Y
x+y=10
x=4.y

Answer 1

x + y = 10
x = 4y

x + y = 10
4y + y = 10
5y = 10
y = 10/5
y = 2

x = 4y
x = 4.2
x = 8

R.: x = 8 e y = 2