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15 April, 10:01

Solve this: 2x+y=-7y Y=x+10

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Answers (2)
  1. 15 April, 10:18
    0
    In this equation, when x = - 8, Y = 2

    Answer check using either equation =

    (1) 2x + y = - 7y = ==> 2 (-8) + 2 = - 7 (2) = ==> - 14 = - 14

    (2) Y = x + 10 = ==> 2 = - 8 + 10 = ==> 2 = 2

    Step-by-step explanation:

    Assuming that you are looking for "x" and "y", Let

    2x + y = - 7y ... (1)

    Y = x + 10 ... (2)

    From equation (2), Y = x + 10, therefore substitute for "Y" in equation (1) to get the value of "x"

    2x + x + 10 = - 7 (x + 10)

    3x + 10 = - 7x - 70

    gather like terms on each side.

    3x + 7x = - 70 - 10

    10x = - 80

    divide through by 10

    x = - 8

    Now substitute for "x" in equation (2)

    Y = x + 10

    Y = - 8 + 10

    Y = 2
  2. 15 April, 10:24
    0
    I think it y=-9 cuz

    Let's solve for x.

    2

    x

    +

    y

    =

    -

    7

    y

    Step 1: Add - y to both sides.

    2

    x

    +

    y

    +

    -

    y

    =

    -

    7

    y

    +

    -

    y

    2

    x

    =

    -

    8

    y

    Step 2: Divide both sides by 2.

    2

    x

    2

    =

    -

    8

    y

    2

    x

    =

    -

    4

    y

    Answer:

    x

    =

    -

    4

    y
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