SOLUTION: I need to find the starting number to my question: X times 7, +20, then divided by 30 to equal 10 thankyou

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Question 975900: I need to find the starting number to my question:
X times 7, +20, then divided by 30 to equal 10
thankyou
Answer by rothauserc(4718) About Me  (Show Source):
You can put this solution on YOUR website!
((x * 7) +20) / 30 = 10
(7x + 20) / 30 = 10
multiply both sides of = by 30
7x + 20 = 300
7x = 280
x - 40