Seven plus twice a number is ten?

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  • 1 month ago
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    Start by writing an equation:

    "Seven plus..."

    7 + 

    "...twice a number..."

    7 + 2x

    "... is ten"

    7 + 2x = 10

    To solve that, start by subtracting 7 from both sides. This will begin to isolate the variable x.

    2x = 10 - 7

    2x = 3

    Next, divide both sides by 2.

    x = 3/2

    x = 1½

    Answer:

    The number is 1½ (or 1.5)

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