SOLUTION: After spending 5/12 of his salary, a man has $420 left. What is his salary?

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Question 192397: After spending 5/12 of his salary, a man has $420 left. What is his salary?
Found 2 solutions by Mathtut, checkley77:
Answer by Mathtut(3670) About Me  (Show Source):
You can put this solution on YOUR website!
let salary be x
:
x-(5/12)x=420
:
(7/12)x=420
:
x=420(12/7)=720

Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
X-5/12*X=420
X-5X/12=420
(12X-5X)/12=420
7X=12*420
7X=5040
X=5040/7
X=$720 WAS THE ORIGINAL SALARY.