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2 March, 15:22

Solve for x.

- 3x + 8y = 5

6x - 2y = 10

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Answers (1)
  1. 2 March, 15:36
    0
    Let us solve this system by substitution.

    -3x + 8y = 5

    6x - 2y = 10

    According to equation 2,

    6x - 2y = 10

    6x = 10 + 2y

    thus, x = 10 + 2y / 6

    substituting the value of x in equation 1,

    -3 (10 + 2y / 6) + 8y = 5

    -30 - 6y + 8y = 5 x 6 = 30

    -30 + 2y = 30

    2y = 60

    Thus, y = 30.

    Substituting the value of y in equation 2,

    6x - 2y = 10

    6x - 2 (30) = 10

    6x - 60 = 10

    6x = 70.

    Thus, x = 70/6.

    Thus, x = 70 / 6 (and y = 30)
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