Chapter 2 - Solving Equations - 2-3 Solving Multi-Step Equations - Practice and Problem-Solving Exercises - Page 98: 14

x=10

We first combine like terms to obtain that 2x+2=22. We need to get the x alone, so we cancel out the addition by subtracting 2 on both sides. This leaves us with the equation 2x=20. We cancel out multiplication by using division, so we divide both sides of the equation by 2 to get that x=10. We plug 10 in for x and confirm that our answer is, indeed, correct.