Question 942939
solve for y with the second equation
4x+2y=10

x-y=13
Subtract the x on both sides so the equation ends up looking like this 
 -y=-x+13
then divide all terms by -1
so then it is y=x-13
and then you substitute the y in 4x+2y=10 for x-13
4x+2(x-13)=10
then you want to distribute the 2 into the x and the -13
4x+2x-26=10
add the like terms 
6x-26=10 
add 26 to both sides of the equal sign so the -26 cancels out
you end up with 
6x=36
Now you wanna isolate the x so divide by 6 on both sides 
6x/6 = x 36/6 = 6
x=6