SOLUTION: one more than the difference between 18 and seven times a number is -9

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Question 1057293: one more than the difference between 18 and seven times a number is -9
Answer by solve_for_x(190) About Me  (Show Source):
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Let x represent the unknown number.

Then "the difference between 18 and 7 times a number" can be represented as:

18 - 7x

Since one more than this value must be equal to -9, you can write:

(18 - 7x) + 1 = -9

or

19 - 7x = -9

Subtracting 19 from both sides gives:

-7x = -28

Dividing both sides by -7 then gives:

x = -28 / -7

x = 4

The unknown number is 4.