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8 November, 07:02

To solve this system of equations by elimination, what operation could be used to eliminate the y-variable and find the value of x? 6x + 5y = 2 4x + 2y = 8

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Answers (2)
  1. 8 November, 08:24
    0
    Subtract 5 times the first equation from 2 times the second equation

    Step-by-step explanation:

    2 (6x + 5y = 2)

    5 (4x + 2y = 8)

    12x + 10y = 4

    20x + 10y = 40

    Subtracting the second equation from first gives:

    -8x = - 36

    x =

    -36

    -8

    x =

    9

    2
  2. 8 November, 08:38
    0
    Multiply each equation by the coefficient of y in the other one.

    Step-by-step explanation:

    (1) 6x + 5y = 2

    (2) 4x + 2y = 8

    Multiply each equation by the coefficient of y in the other one.

    Multiply (1) by 2 and (2) by 5.

    (3) 12x + 10y = 4

    (4) 20 x + 10y = 40 Subtract (3) from (2)

    8x = 36 Solve for x

    x = 9/2
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