Question 1176549
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Hi
 Larry +  Mark  +   Andrew
 (x+ 5)+   x    +  2(x+5)+6 = 57
        4x = 36
         x = 9, Mark's age, Larry is 14  and Andrew is 34   {{{28+6}}}

 9 + 14 + 34 = 57 checks
Wish You the Best in your Studies.
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