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20 January, 18:48

How do I work out 3x + 65 = 7x + 13

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  1. 20 January, 20:30
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    3x + 65 = 7x + 13

    Here's one way:

    Subtract 3x from each side: 65 = 4x + 13

    Subtract 13 from each side: 52 = 4x

    Divide each side by 4 : 13 = x
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