SOLUTION: solve the system x-y=1 3x+4y=24

Algebra ->  Linear-equations -> SOLUTION: solve the system x-y=1 3x+4y=24      Log On


   



Question 24405: solve the system x-y=1
3x+4y=24

Answer by elima(1433) About Me  (Show Source):
You can put this solution on YOUR website!
x-y=1
3x+4y=24
First solvethe first equation for x;
x=1+y
Now plug that into the second to solve for y;
3(1+y)+4y=24
3+3y+4y=24
3+7y=24
Now subtract 3 from both sides;
7y=24-3
7y=21
Divide each side by 7;
7y%2F7=21%2F7
y=3
Now that you have y=3, plug it into the equation and solve for x;
x-(3)=1
x=1+3
x=4
Hope you understand
=)