document.write( "Question 1185604: Three years ago,Ali was eight times as old as Adi.Three years from now,Ali will only be five times as old as Adi.Find their present ages. \n" ); document.write( "

Algebra.Com's Answer #816429 by math_helper(2461) $\"\"$ $\"About$

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document.write( "Let L = Ali's age now
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document.write( "and D = Adi's age now\r
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document.write( "From the 3yrs ago info:
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document.write( "(1)  L-3 = 8(D-3)  -->  L = 8D-21\r
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document.write( "From the 3yrs from now info:
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document.write( "(2)  L+3 = 5(D+3)  -->  L = 5D+12\r
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document.write( "L=L -->  8D-21 = 5D+12 \r
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document.write( "Solve this to get  D=11  (Adi is 11)
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document.write( "Plug D=11 into (1) or (2) and solve for L:  L = 67   (Ali is 67)\r
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document.write( "Check:
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document.write( "67-3 = 64 
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document.write( "8(11-3) = 64  (ok, using 3yrs ago info)\r
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document.write( "67+3 = 70
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document.write( "5(11+3) = 70  (ok, using 3yrs from now info) 
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