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Question
Set up equation and solve them to find the unknown number in the following case:
When I subtracted 11 from twice a number, the result was 15.
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Solution
Let the number be x.
Twice of this number = 2x
2x - 11 = 15
2x = 15 + 11 ...(Transposing -11 to R.H.S.)
2x = 26
Dividing both sides by 2
`(2x)/2 = 26/2`
x = 13
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