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Let X equal the mystery number in this example. In this case, a number plus 3 times that number would be expressed as X+3X, and 76 would simply be expressed as 76. Now, to the equation:

X+3X= 76 First, simplify the left side of the equation

4X= 76 Next, divide both sides by 4 to get X by itself, and hence your answer

X=19

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13y ago
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Q: The sum of a number and 3 times that number is 76. What is the number?
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