You can
put this solution on YOUR website!Is it suppose to be;
3x+y=20
x+y=12?
If so;
There are different ways to solve;
One is by substitution, which is what we will do;
so we will look at the second equation and solve for y;
x+y=12
y=12-x
Now substitute that into the first equation for y;
3x+(12-x)=20
2x=20-12
2x=8
x=4
Now plug 4 into the equation for x;
3(4)+y=20
12+y=20
y=20-12
y=8
So we have;
x=4 and y=8
=)
(