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21 September, 04:10

Solve by substitution

4x=y-1

6x-2y=-3

+4
Answers (1)
  1. 21 September, 06:31
    0
    4x = y - 1 ⇒ 4x + y = - 1 ⇒ 12x + 3y = - 3

    6x - 2y = - 3 ⇒ 6x - 2y = - 3 ⇒ 12x - 4y = - 6

    7y = 3

    7 7

    y = 3/7

    12x + 3 (3/7) = - 3

    12x + 1 3/7 = - 3

    -1 2/7 - 1 2/7

    12x = - 4 2/7

    12 12

    x = - 5/14

    (x, y) = (-5/14, 3/7)
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