Combine like terms to simplify 2xy-xy-y+7y-xy

2xy - xy - y + 7y - xy

All the "xy" terms can combine.

2xy - xy - xy

(Imagine there is a 1 in front of the variables - 2-1-1=0)

Now you're left with the - y + 7y.

Your answer after combining like terms is 6y.

The Answer Is 3 When You Combine Like Terms