document.write( "Question 1086805: Ann's age is seven-tenths of bills age. In 4 years Ann's age will be eight-elevenths of bill's age. How old is bill now? \n" ); document.write( "

Algebra.Com's Answer #701037 by Fombitz(32388) $\"\"$ $\"About$

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$\"A=%287%2F10%29B\"$
\n" ); document.write( " $\"10A=7B\"$
\n" ); document.write( "In 4 years,
\n" ); document.write( " $\"A%2B4=%288%2F11%29%28B%2B4%29\"$
\n" ); document.write( " $\"11%28A%2B4%29=8%28B%2B4%29\"$
\n" ); document.write( " $\"11A%2B44=8B%2B32\"$
\n" ); document.write( " $\"11A=8B-12\"$
\n" ); document.write( "Multiply both sides by 10,
\n" ); document.write( " $\"11%2810A%29=80B-120\"$
\n" ); document.write( "Substitute,
\n" ); document.write( " $\"11%287B%29=80B-120\"$
\n" ); document.write( " $\"77B=80B-120\"$
\n" ); document.write( " $\"-3B=-120\"$
\n" ); document.write( " $\"B=40\"$
\n" ); document.write( "Now use either equation to solve for A.
\n" ); document.write( " \n" ); document.write( "

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