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4 January, 07:18

How can I find the value of a variable to make an equation true instead of false?

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  1. 4 January, 07:38
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    So, this means we need to solve for x.

    So, lets say we have 5 + 7 + x = 25

    You start by getting x on its own. Subtract 5 from both sides (to keep it even)

    25 - 5 = 20

    Then, we're left with 7 + x = 20

    Subtract 7 from each side.

    20 - 7 = 13

    We are then left with:

    x = 13

    If we plug x in, 5 + 7 + 13 = 25, then we find out that x = 13 is true.
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