document.write( "Question 867128: the ratio of the present ages of a and b is 11:4 and 15 years ago it was 8:1. if 5 years ago the ratio of the ages of b and c was 3:2,then what is c's present age ? \n" ); document.write( "

Algebra.Com's Answer #522760 by ewatrrr(24785) $\"\"$ $\"About$

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document.write( "  a = (11/4)b
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document.write( " 8(b-15) = (11/4)b-15
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document.write( " 32(b-15) = 11b - 60
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document.write( " 32b - 32*15 = 11b - 60
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document.write( "       21b = 420
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document.write( "         b = 20
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document.write( "     30 = 3(c-5)
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document.write( "     30 = 3c - 15
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document.write( "     45 = 3c
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document.write( "      c = 15, present age
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