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10 March, 17:45

Find the value of x in the equation 3 (x + 2) = x.

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  1. 10 March, 19:22
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    First number = x

    Consecutive number = x+1

    "squares differ by 31" means to square both numbers and subtract them:

    (x+1) ^2 - (x) ^2 = 31

    x^2+2x+1 - x^2 = 31

    2x+1 = 31

    2x = 30

    x = 15 (first number)

    x+1 = 15+1 = 16 (consecutive number)
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