Consider the following pair of equations: y = x + 4 y = −5x − 2 Explain how you will solve the pair of equations by substitution. Show all t

Question

Consider the following pair of equations: y = x + 4 y = −5x − 2 Explain how you will solve the pair of equations by substitution. Show all the steps and write the solution in (x, y) form.

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Hưng Khoa 2 months 2021-08-01T03:10:21+00:00 2 Answers 2 views 0

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    0
    2021-08-01T03:11:32+00:00

    Answer:

    (-1, 3)

    Step-by-step explanation:

    to solve using substitution, you have to know the value of either x or y. in this example, they gave you the value of y already: y=x+4.

    this means you can substitute the y for (x+4). if we substitute y for (x+4) in the equation y=-5x-2, we get this:

    (x+4)=-5x-2

    then solve for x

    6x=-6

    so x=-1

    since we know the x value, we can solve for y

    y=x+4

    y=-1+4

    y=3

    so the final answer is (-1, 3)

    0
    2021-08-01T03:12:20+00:00

    Answer:

    (- 1, 3 )

    Step-by-step explanation:

    Given the 2 equations

    y = x + 4 → (1)

    y = – 5x – 2 → (2)

    Substitute y = x + 4 into (2)

    x + 4 = – 5x – 2 ( add 5x to both sides )

    6x + 4 = – 2 ( subtract 4 from both sides )

    6x = – 6 ( divide both sides by 6 )

    x = – 1

    Substitute x = – 1 into either of the 2 equations and evaluate for y

    Substituting into (1)

    y = – 1 + 4 = 3

    solution is (- 1, 3 )

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Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )