document.write( "Question 116723: mark is 10 yrs younget than larry.larrys age8 years from now will wxceed twice marks age3 yearsago by 4 years . how old is each boy? \n" ); document.write( "
Algebra.Com's Answer #84922 by ankor@dixie-net.com(22740)\"\" \"About 
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mark is 10 yrs younger than larry.
\n" ); document.write( "M = L - 10
\n" ); document.write( ":
\n" ); document.write( "larry's age 8 years from now, will exceed twice marks age 3 years ago by 4 years.
\n" ); document.write( "L + 8 = 2(M-3) + 4
\n" ); document.write( "Do some basic algebra on this
\n" ); document.write( "L + 8 = 2M - 6 + 4
\n" ); document.write( "L + 8 = 2M - 2
\n" ); document.write( "L = 2M - 2 - 8
\n" ); document.write( "L = 2M - 10
\n" ); document.write( ":
\n" ); document.write( "how old is each boy?
\n" ); document.write( "Substitute (L-10) for M in the above equation, solve for L:
\n" ); document.write( "L = 2(L-10) - 10
\n" ); document.write( "L = 2L - 20 - 10
\n" ); document.write( "L = 2L - 30
\n" ); document.write( "L - 2L = -30
\n" ); document.write( "-L = -30
\n" ); document.write( "L = -30/-1
\n" ); document.write( "L = +30 is Larry's age
\n" ); document.write( "Then
\n" ); document.write( "M = 30 - 10 = 20 is Marks age
\n" ); document.write( ":
\n" ); document.write( ":
\n" ); document.write( "Check our solution using the statememt:
\n" ); document.write( "\"larrys age8 years from now will exceed twice marks age 3 years ago by 4 years\".
\n" ); document.write( "(30 + 8) = 2(20-3) + 4
\n" ); document.write( "38 = 2(17) + 4; confirms our solution
\n" ); document.write( ":
\n" ); document.write( "Did this method makes sense to you? Any questions? \n" ); document.write( "
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