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25 October, 22:53

Evaluate the expression - 5x+2.5x+4.5-x+3 when x=3

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  1. 25 October, 23:20
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    Step-by-step explanation:

    -5x+2.5x+4.5-x+3 = - 5x+2.5x-x + 4.5 + 3

    =-3.5x + 7.5

    = - 3.5*3+7.5 {x = 3}

    = - 10.5 + 7.5

    = - 3
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