Question 627842
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Hi
Archie does as much work in three hours as Bill does in four hours.  B = 3/4 A or {{{A = (4/3)B}}}
Bill's son works half as fast as Bill. {{{Son = B/2}}}
Question states*** together they earn $8.50 per hour
    {{{(4/3)B + B + B/2 = 8.50}}}   |Multiplying thru by 6 so as all denominators = 1
  8B + 6B + 3B =  51
            17b = $51
              B = $3.00  Son = $1.50  and A = $4.00
and...
 $3.00 + $4.00 + $1.50 = $8.50