posted by maddie .
To solve the system of equations, which expression could be substituted for x into the first equation?
I have another problem just like this one so if you could explain how to solve this one I can (hopefully) solve the other,thanks
Solve the second equation for x:
x + 4 y = 10 --->
x = 10 - 4 y
ok I think I got the idea,lets try this one.
I'm thinking 2y-15 here are the choices:
x = 2y + 15
to solve the system of equations, whcih expression could be substituted for x into the first equation? First - 2x+7y=10; second = x-2y=15