SOLUTION: five times the sum of some number plus 3 is equal to 9 times the number minus 21

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Question 285575: five times the sum of some number plus 3 is equal to 9 times the number minus 21
Answer by checkley77(12844) About Me  (Show Source):
You can put this solution on YOUR website!
5(x+3)=9x-21
5x+15=9x-21
5x-9x=-21-15
-4x=-36
x=-36/-4
x=9 ans.
Proof:
5(9+3)=9*9-21
5*12=81-21
60=60