9 times a number is that number minus 3 | MathCelebrity Forum

9 times a number is that number minus 3

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9 times a number is that number minus 3

Let a number be an arbitrary variable, let's call it x. We're given:
9 times a number is 9x
The number minus 3 is x - 3

The word is means an equation, so we set 9x equal to x - 3 to get our algebraic expression:
9x = x - 3

To solve for x, we type this equation into our search engine and we get:
x = -0.375 or -3/8
 
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