Question 1150141
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Let x be the number of Php 5-coins.

Then the number of Php 1-coins is  (2x+1), according to the condition.


The total money equation is


    5x + 1*(2x+1) = 57.


Simplify and solve for x.


<U>ANSWER</U>.  8 Php 5-coins and (2*8+1) = 17 Php 1-coins.


<U>CHECK</U>.   8*5 + 17*1 = 40 + 17 = 57 Php.    ! Correct !
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Solved.