document.write( "Question 205213: riza is 25 when her first son was born,today the sum of their ages is 105.how old is riza and her son now? \n" ); document.write( "

Algebra.Com's Answer #154904 by vleith(2983) $\"\"$ $\"About$

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Let b be the age of the son
\n" ); document.write( "let r be riza's age
\n" ); document.write( " $\"r+=+b+%2B+25\"$
\n" ); document.write( "Given $\"r+%2B+b+=+105\"$
\n" ); document.write( " $\"%28b%2B25%29+%2B+b+=+105\"$
\n" ); document.write( " $\"2b+%2B+25+=+105\"$
\n" ); document.write( " $\"2b+=+80\"$
\n" ); document.write( " $\"b+=+40\"$
\n" ); document.write( "Her boy is not 40. Since she is 25 years older than he, Riza must be 65. \r
\n" ); document.write( "\n" ); document.write( "Just don't tell her friends, Riza tells them she is 51 ;). \n" ); document.write( "

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