document.write( "Question 572622: The sum of 4 times mikes age and 3 times susan's age is 79. mike is 1 year more than 3 times as old as susan. find each of their ages. \n" ); document.write( "
Algebra.Com's Answer #368461 by Maths68(1474)\"\" \"About 
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Let
\n" ); document.write( "Present age of mike = m
\n" ); document.write( "Present age of Susan = s\r
\n" ); document.write( "\n" ); document.write( "Given
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\n" ); document.write( "The sum of 4 times mikes age and 3 times susan's age is 79
\n" ); document.write( "4m+3s=79..............(1)
\n" ); document.write( "Mike is 1 year more than 3 times as old as Susan
\n" ); document.write( "m=3s+1................(2)
\n" ); document.write( "put the value of m from (2) to (1)
\n" ); document.write( "m=3s+1
\n" ); document.write( "4(3s+1)+3s=79
\n" ); document.write( "12s+4+3s=79
\n" ); document.write( "15s+4=79
\n" ); document.write( "15s=79-4
\n" ); document.write( "15s=75
\n" ); document.write( "15s/15=75/15
\n" ); document.write( "s=5
\n" ); document.write( "put the value of s in (2)
\n" ); document.write( "m=3s+1................(2)
\n" ); document.write( "m=3(5)+1
\n" ); document.write( "m=15+1
\n" ); document.write( "m=16\r
\n" ); document.write( "
\n" ); document.write( "\n" ); document.write( "Present age of mike = m = 16 years old
\n" ); document.write( "Present age of Susan = s = 5 years old
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