7 times a number and 2 is equal to 4 times a number decreased by 8

Publish date: 2024-07-23
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The phrase a number means an arbitrary variable, let's call it x.
x

7 times a number:
7x

and 2 means we add 2:
7x + 2

4 times a number
4x

decreased by 8 means we subtract 8:
4x - 8

The phrase is equal to means an equation, so we set 7x + 2 equal to 4x - 8:
7x + 2 = 4x - 8

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