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23 September, 13:08

The sum of 3 times a number and 5 is 2 times the number plus 15. what is half the number?

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  1. 23 September, 16:29
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    Define x:

    Let the sum be x

    Construct the equation:

    The sum of 3 times a number and 5 is 2 times the number plus 15.

    → 3x + 5 = 2x + 15

    Solve x:

    3x + 5 = 2x + 15 | Equation

    x + 5 = 15 | Take away 2x from both sides

    x = 10 | Take away 5 from both sides

    Answer: The number is 10.
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