What is the value of a if the point ( a, -1) is on the line 4x -3y = 15?

Question

What is the value of a if the point ( a, -1) is on the line 4x -3y = 15?

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Sapo 4 years 2021-08-04T22:52:37+00:00 2 Answers 9 views 0

Answers ( )

  1. thuthuy
    0
    2021-08-04T22:53:53+00:00
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    Answer:

    a = 3

    Step-by-step explanation:

    (a, -1) is (x, y)

    Plug in the value of y into the given equation to solve for a (x):

    4x – 3(-1) = 15

    4x + 3 = 15

    4x = 12

    x = 3

    (x, y) is (a, -1) so (a, -1) = (3, -1)

  2. Amity
    0
    2021-08-04T22:53:55+00:00
    Reply

    Answer: a=3

    Step-by-step explanation:

    We are given a point and an equation. To see what “a” is, we can plug in the coordinate into the equation and solve for x.

    4a-3(-1)=15       [multiply]

    4a+3=15           [subtract both sides by 3]

    4a=12               [divide both sides by 4]

    a=3

    Now, we know that a=3.

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