Question

Calcule:

x= 2y
x+y=3

Answer 1

2y+y = 3

3y = 3

y = 3/3

y = 1


x = 2(1)

x = 2

Answer 2

x+y=3
2y+y=3
3y=3
y=3/3=1
y= 1 

x=2y
x=2.1=2