SOLUTION: The solution to" the product of 5 and the quantity decreased by 10 is 40" ?

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Question 550702: The solution to" the product of 5 and the quantity decreased by 10 is 40" ?
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
The solution to" the product of 5 and the quantity decreased by 10 is 40" ?
:
Let x = "the quantity"
then
5(x-10) = 40
5x - 50 = 40
5x = 40 + 50
5x = 90
x = 90/5
x = 18
:
:
See if that checks out: 5(18-10) = 40