Question 867128
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Hi
{{{a/b = 11/4}}}  a = (11/4)b
{{{( (11/4)b-15)/(b-15) = 8/1}}}
 8(b-15) = (11/4)b-15
 32(b-15) = 11b - 60
 32b - 32*15 = 11b - 60
       21b = 420
         b = 20
{{{(20-5)/(c-5) = 3/2}}}
     30 = 3(c-5)
     30 = 3c - 15
     45 = 3c
      c = 15, present age