Posted by kate on Sunday, September 5, 2010 at 3:22am.
1. find a common multiple for the denominators of both fractions.
2. combine the fractions together. do not expand the numerator first.
3. cross multiply.
4. expand the terms
5. make x the subject.
6. solve.
Here is a better way.
Perform the indicated multiplications and combine terms
(2/5)(20x+5) - (1/2)(8-4x) = 38
8x +2 -4 +2x = 38
10x = 40
x = 4
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