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7 March, 21:44

8*9 = (5+y) * 9, what is y?

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  1. 7 March, 22:10
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    8 * 9 = (5 + y) * 9

    multiply 8 and 9

    72 = (5 + y) * 9

    use the distributive property

    72 = 45 + 9y

    subtract 45 from both sides

    27 = 9y

    divide both sides by 9 to isolate the variable

    y = 3
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