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Coolmath Prealgebra
Solving Equations Lesson 5 - Solving Messier Equations   (page 1 of 2)
---- This prealgebra lesson explains how to solve messier equations.
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The game is the same... The problems just start out messier.

Let's try one:

Solve    3 ( 2x + 5 ) = 4x + 7 - x + 1

Start by cleaning up both sides...

3 ( 2x + 5 ) = 4x + 7 - x + 1 distribute the 3 to the 2x and to the 5... and add like terms on the right side

6x - 3x + 15 = 3x - 3x + 8 (ditching the smallest x guy) which gives 3x + 15 - 15 = 8 - 15 (ditching the 15) which gives 3x = -7 ditch the 3 3x/3 = -7/3 which gives x = -7/3

I'll let you check it!

Continued on the next page

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