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20 December, 18:29

10 (y+2) - y=2 (9y-8) i need to know how to solve it

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  1. 20 December, 19:10
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    10 (y+2) - y=2 (9y-8)

    Mutiply the first bracket by 10

    Mutiply the second bracket by 2

    (10) (y) (10) (2) = 10y+20

    (2) (9y) (2) (-8) = 18y-16

    10y+20-y = 18y-16

    10y-y+20 = 18y-16

    9y+20 = 18y-16

    move 18y to the other side

    sign changes from + 18y to - 18y

    9y-18y+20 = 18y-18y-16

    -9y+20 = - 16

    move + 20 to the other side

    sign changes from + 20 to - 20

    -9y+20-20=-16-20

    -9y = - 36

    divide by - 9

    -9y/-9 = - 36/-9

    y = 4

    Answer: y = 4
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