Question 126972
If I read it right, his overtime rate 
is $3 more than his regular rate
Let his regular rate = {{{r}}}
Let his overtime rate = {{{s}}}
{{{s = r + 3}}}
{{{5r + 4s = 66}}}
{{{5r + 4(r + 3) = 66}}}
{{{5r + 4r + 12 = 66}}}
{{{9r = 54}}}
{{{r = 6}}}
His regular rate is $6 /hr
check answer
{{{s = r + 3}}}
{{{5r + 4s = 66}}}
{{{s = 6 + 3}}}
{{{s = 9}}}
{{{5*6 + 4*9 = 66}}}
{{{30 + 36 = 66}}}
{{{66 = 66}}}
OK