Question 103564

x + y = 12---------------eq1
y = 2x ----------------------eq2

Lets substitute y=2x from eq2 into eq1 and we get:

x+2x=12  collect like terms

3x=12   divide both sides by 3

x=4

Now we can substitute x=4 into eq2 and we get:

y=2*4=8

So our answer is:

x=4 and
y=8

CK
From eq1:
x+y=12
4+8=12
12=12
From eq2:
y=2x
8=2*4
8=8


Hope this helps---ptaylor