document.write( "Question 1053655: In two years bob will be three times as old as Al. 8 years ago, Bob was 5 times his age. How old is bob now? \n" ); document.write( "
Algebra.Com's Answer #668858 by addingup(3677)\"\" \"About 
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\n" ); document.write( "Let Bob be b and Al A.
\n" ); document.write( "b+2 = 3(a+2) = 3a+6
\n" ); document.write( "b = 3a+4
\n" ); document.write( "b-8 = 5(a-8)
\n" ); document.write( "b-8 = 5a-40 substitute for b:
\n" ); document.write( "3a+4-8 = 5a-40
\n" ); document.write( "3a-4 = 5a-40
\n" ); document.write( "36 = 2a
\n" ); document.write( "flip it:
\n" ); document.write( "2a = 36
\n" ); document.write( "a = 18 Al is 18
\n" ); document.write( "b = 3a+4 = 3(18)+4 = 54+4 = 58 Bob is 58
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\n" ); document.write( "Check:
\n" ); document.write( "In 2 years Bob will be 3* older than Al
\n" ); document.write( "58+2 = 60 and 18+2 = 20 and 20*3 = 60 Correct
\n" ); document.write( "and
\n" ); document.write( "8 years ago Bob was 5 times Al
\n" ); document.write( "58-8 = 5(18-8) = 50 = 5*10 Correct
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