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8 January, 23:15

What is 1/2 (7z+4) + 1/5 (5z-15

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  1. 9 January, 01:28
    0
    1/2 is the same as 2 and 1/5 is the same as 5

    so it will go like this

    2 (7z+4) + 5 (5z-15)

    14z+6 - 25z+75

    collect like terms

    =14z+25z-75+6

    39z - 81
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