Question 324883
$45 for each hour 
a flat $30 consulting fee.
$210 bill 
..
let the number of hours she worked be x
$45 /hour 
charges for hours= 45x
..
45x + 30 = 210
add -30 to both sides
45x +30-30=210-30
45x=180
x=180/45
x= 4 the number of hours she works.