Answer:
x=1
y=6
Step-by-step explanation:
We are going to name the equations like this:
3x+y=9 (1)
y-2x=4 (2)
From the equation (1), we know that:
y=9-3x
And, we replace the value of y in the equation (2) and we obtain:
(9-3x)-2x=4
9-5x=4
-5x=4-9
-5x=-5
x=1
And, in the same way, we replace the value of x in the equation (1) and we obtain:
y=9-3(1)
y=9-3
y=6
