Algebra
posted by Anonymous on .
I'm asked to solve the following system using elimination and say how many solutions there are:
4x  7y = 15
8x + 14y = 30
The answer says that there are infinitely many solutions, but I am getting 8x  14y = 30 and 8x + 14y = 30. I think they both come up as 30 and 30, so they aren't the same. Could someone please explain how to do this?

Just multiply everything in either of your equations by 1 to see that they are really the same equation.
2x = 4
is the same as
2x = 4