SOLUTION: I add 7 to a certain number i double the result. my final answer is 34 what was my number

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Question 1147283: I add 7 to a certain number i double the result. my final answer is 34 what was my number
Answer by rothauserc(4718) About Me  (Show Source):
You can put this solution on YOUR website!
let x be the number, then
:
2 * (x + 7) = 34
:
2x + 14 = 34
:
2x = 20
:
x = 10
:
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The number is 10
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:
check the answer
:
2 * (10 + 7) = 34
:
2 * 17 = 34
:
34 = 34
:
answer checks
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