twice a number, added to 3, is equal to the negative of the number

Algebra
Tutor: None Selected Time limit: 1 Day

twice a number, added to 3, is equal to the negative of the number. what is the number?

Nov 22nd, 2014

let the number be x,
twice the number means 2x,
3 is added so 2x+3
is equal to negative of the number means 2x+3 =-x
so we need to solve,

2x+3=-x
or, 2x+x = -3
or, 3x =-3
therefore, x=-3/3 = -1 (answer)


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Nov 22nd, 2014

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