biAlcadiralez biAlcadiralez

15-03-2017
Mathematics

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If the sum of a number and six is doubled, the result is five less than the number. find the number

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charlottekrist charlottekrist

15-03-2017

Let x represent the number. The same of the number and 6. x+6.
The same of the number and six doubled. 2x+12
"Is" means equals. Five less than the number. x-5.
So, 2x+12=x-5
2x+12-x=-5
x+12=-5
x=-5-12
x=-17

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