We call this a two-step equation because it took two steps to solve. The first step was to subtract 77 from both sides, and the second step was to divide both sides by 33. Want an explanation of why we do the same thing to both sides of the equation? Check out this video.
We check the solution by plugging 2start color redD, 2, end color redD back into the original equation:
Example 2: Variables on both sides
Solve for aa.
5+14a=9a−55, plus, 14, a, equals, 9, a, minus, 5
We need to manipulate the equation to get aa by itself.