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14 February, 02:59

If 3a = - 9 ab = 15. What's the value of b

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  1. 14 February, 03:05
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    b = - 5

    Step-by-step explanation:

    So we know

    3a = - 9

    Divide 3 on both sides

    a = - 3

    Plug a in to the other equation

    -3b = 15

    divide - 3 on both sides

    b = - 5
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