SOLUTION: A mechanic earns $20 an hour, but 25% of his earnings are deducted for taxes and various types of insurance. What is the least number of hours the mechanic must work in prder to ha

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Question 514748: A mechanic earns $20 an hour, but 25% of his earnings are deducted for taxes and various types of insurance. What is the least number of hours the mechanic must work in prder to have no less than $450 in after tax-income?
answer is 30 h.
how do i get that answer?
Answer by mananth(16946) About Me  (Show Source):
You can put this solution on YOUR website!
let the number of hours he works to get $450 be x
$20/h
so he will get 20x
25% deducted
0.25of 20x deducted
=5x
20x-5x=450
15x>= 450
/15
x>= 450/15
x>=30
He should work 30 hours or more
m.ananth@hotmail.ca