Algebra

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Luis Guzman Luis Guzman
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Algebra

The sum of nine and three times a number is 81.
AlgebraHouse AlgebraHouse
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Re: Algebra

x = the number

3x + 9 = 81   {the sum of 9 and three times a number is 81}
3x = 72   {subtracted 9 from each side}
x = 24   {divided each side by 3}

The number is 24

- Algebra House