SOLUTION: subtract the expressions with unlike denominators as indicated z/8z-64 - z-7/z-8

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Question 212947: subtract the expressions with unlike denominators as indicated
z/8z-64 - z-7/z-8
Answer by Earlsdon(6294) About Me  (Show Source):
You can put this solution on YOUR website!
Subtract:
%28z%2F%288z-64%29%29-%28%28z-7%29%2F%28z-8%29%29 Factor an 8 from the denominator of the first fraction.
%28z%2F8%28z-8%29%29-%28%28z-7%29%2F%28z-8%29%29 Now multiply the second fraction by 8%2F8 so that the fractions will have a common denominator.
%28z%2F8%28z-8%29%29-%288%28z-7%29%2F8%28z-8%29%29 Simplify the numerators and subtract the fractions.
%28z-8z%2B56%29%2F%288%28z-8%29%29 Simplifying the numerator, we get:
%28%28-7z%29%2B56%29%2F%288%28z-8%29%29 Factor a -7 from the numerator.
%28-7cross%28%28z-8%29%29%29%2F%288cross%28%28z-8%29%29%29 Cancel the (z-8)'s as indicated to leave you with:
highlight%28-7%2F8%29