Solve the following equations. Some equations will have a single answer, others will have no solution, and still others will have infinite solutions


1. 2x + 2x + 2 = 4x + 2

2. 3(x − 1) = 2x + 9

3. 2x + 8 = 2(x + 4)

4. 2x − x + 7 = x + 3 + 4