Question

If - 20 is added to a number, the sum will be 8 times the number. Find the number.

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I’m not understanding this equation

Answer 1

Let the number = x

add -20’tonx to have x + -20 which becomes x-20

That equals 8 times the number x

The equation becomes

X-20 = 8x

Subtract x from both sides :

-20 = 7x

Divide both sides by 7:

X = -20/7

The number is -20/7