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28 August, 22:13

What is the value of a in the equation 5a - 10b = 45, when b = 3?

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Answers (2)
  1. 28 August, 22:17
    0
    Plug 3 in

    5a - 10 (3) = 45

    5a - 30 = 45

    Perform the opposite operation by adding 30 on both sides of the equation

    5a = 75

    Perform the opposite operation of dividing both sides of the equation by 5

    5's cross out on the left

    5/5=1

    Result will be 15 on the right

    75/5 = 15

    a = 15
  2. 28 August, 22:37
    0
    5a-10 * (3) = 45

    5a=75

    a=15

    (b=3)
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