document.write( "Question 212947: subtract the expressions with unlike denominators as indicated
\n" ); document.write( "z/8z-64 - z-7/z-8 \n" ); document.write( "

Algebra.Com's Answer #160861 by Earlsdon(6294) $\"\"$ $\"About$

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Subtract:
\n" ); document.write( " $\"%28z%2F%288z-64%29%29-%28%28z-7%29%2F%28z-8%29%29\"$ Factor an 8 from the denominator of the first fraction.
\n" ); document.write( " $\"%28z%2F8%28z-8%29%29-%28%28z-7%29%2F%28z-8%29%29\"$ Now multiply the second fraction by $\"8%2F8\"$ so that the fractions will have a common denominator.
\n" ); document.write( " $\"%28z%2F8%28z-8%29%29-%288%28z-7%29%2F8%28z-8%29%29\"$ Simplify the numerators and subtract the fractions.
\n" ); document.write( " $\"%28z-8z%2B56%29%2F%288%28z-8%29%29\"$ Simplifying the numerator, we get:
\n" ); document.write( " $\"%28%28-7z%29%2B56%29%2F%288%28z-8%29%29\"$ Factor a -7 from the numerator.
\n" ); document.write( " $\"%28-7cross%28%28z-8%29%29%29%2F%288cross%28%28z-8%29%29%29\"$ Cancel the (z-8)'s as indicated to leave you with:
\n" ); document.write( " $\"highlight%28-7%2F8%29\"$ \n" ); document.write( "

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