Question 1185053
<pre>
    RATE of pay          TIME         PAY
     75/x                 x           75
     75/(x+2)             x+2         75
</pre>
The way the situation is described,  {{{75/x-75/(x+2)=1.25}}};  simplify and solve.


{{{60/x-60/(x+2)=1}}}
.
.
{{{x^2+2x=120=10*12}}}
{{{x(x+2)=10*12}}}
Strongly shows {{{highlight(x=10)}}}--------time the boy actually worked.


Pay rate,   $7.5 per hour