Solve the system of equations. – 5x + 2y = 9 y = 7x X = Y =

Question

Solve the system of equations.
– 5x + 2y = 9
y = 7x

X =
Y =

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Kennedy 1 week 2021-09-12T12:00:53+00:00 2 Answers 0

Answers ( )

    0
    2021-09-12T12:02:11+00:00

    Answer:


    x−y
    =
    9
    , x
    +
    y
    =
    6

    x
    +
    y
    =
    4  ,  x

    y
    =
    2

    x
    +
    2
    y
    =
    4  ,  x

    y
    =

    3

    try out these examples?

    0
    2021-09-12T12:02:17+00:00

    Answer:

    x = 1

    y = 7

    Step-by-step explanation:

    Your system of equations is

    -5x + 2y = 9

    y = 7x

    The easiest way to solve this is by substitution.  This means that you set one of the equations equal to a variable and you plug that variable into the variable of the other equation.  The second equation (y = 7x) is already set up this way so we will plug it into the first equation.

    -5x + 2(7x) = 9

    -5x + 14x = 9

    9x = 9

    (9x)/9 = (9)/9

    x = 1

    You have found x.  Now, plug this number into the second equation (y = 7x) to find the value of y.

    y = 7(1)

    y = 7

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45:7+7-4:2-5:5*4+35:2 =? ( )