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Coolmath Prealgebra
Solving Equations Lesson 6 - Dealing with Fractions & Decimals
(page 2 of 6)
---- This prealgebra lesson explains how to solve equations that have fractions and decimals in them.
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YOUR TURN:

Solve          5 - (4/3)x = 2 

Sometimes, there are two fractions to deal with:

Solve    (3/5)x + 2 = 1/4

We'll need to ditch the 5 AND the 4...  So, we'll multiply both sides by 5x4 = 20!

20( (3/5)x + 2 ) = 20(1/4)  which gives   ((20)(3)/5)x + 20(2) = (20)(1)/4  which gives  12x + 40 = 5  ditch the 40...  12x + 40 - 40 = 5 - 40  which gives  12x = -35  ditch the 12...  12x/12 = -35/12  which gives  x = -35/12

Continued on the next page

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