The sum of a number and 2 times the number is 21. Find the number.

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Mathematics

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17 April, 19:25

The sum of a number and 2 times the number is 21. Find the number.

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Roberto Miller · Answer 1

To find the number you would start by writing out the equation using x as the number. The equation would be x+2x=21. The first step to solve this equation would be to combine like terms, making the equation 3x=21. Finally, you would divide both sides by three, making your answer x=7.