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4 January, 08:00

I justify whether the expression - 4x-8 is equivalent to - 2 (x+1) - 2 (x+3) by letting x=3 in both expressions. What is the value of each expression when x=3

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  1. 4 January, 08:24
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    Substituting x = 3 into the first expression:

    -4 (3) - 8 = - 12 - 8 = - 20

    Substituting x = 3 into the second expression:

    -2 (3 + 1) - 2 (3 + 3) = - 2 (4) - 2 (6) = - 8 - 12 = - 20
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