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pentagon [3]
2 years ago
15

if the sum of a number and nine is doubled, the result is seven less than the number. find the number.

Mathematics
1 answer:
avanturin [10]2 years ago
3 0
X=the number we have to find.
This expression "2(x+9)" is when the sum of a number and nine is doubled.
If the result is seven less than the number, we will have: x-7

We can suggest the following equation:
2(x+9)=(x-7)
2x+18=x-7
2x-x=-7-18
x=-25

answer: the number would be:  -25.
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