# math

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When you subtract 2 from a number, double the difference, and then add 7, you get 57. What is the number?

• math -

n = the number
n - 2 = subtract 2 from the number
2(n - 2) = double the difference
2(n - 2) + 7 = then add 7

2(n - 2) + 7 = 57
2n - 4 + 7 = 57
2n + 3 = 57
2n = 54
n = 27

The number is 27

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