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5 votes
if you subtract 13 from my number and multiply the difference by -4, the result is -40, what is the number?

1 Answer

6 votes

Answer:

23

Explanation:

let the number = X

subtracting 13 from X = X -13

multiplying the difference by -4= (X -13)×-4

the result is -40 means (X-13)×-4=-40

(X- 13)×-4 = -40

-4 X +52 = -40

collect like term

-4 X = -40-52

- 4X = -92

dividing bothsides by -4

-4 X /-4 = -92/-4

X = 23

User Yury Fedorov
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