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10 February, 16:09

If 5x+15y=45 then 6x-18y=?

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  1. 10 February, 16:21
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    So we have 5x+15y=45

    simplify and undistribute 5 from both sides

    5 (x+3y) = 5 (9)

    divide both sides by 5

    x+3y=9

    multiply both sides by 6

    6x+18y=54

    if it was 6x+18y then the answer is 54

    if it was 6x-18y, then I don't know the answer
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