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8 September, 19:41

Find the value of y when x equals 4, - 3x+9y=-57

+5
Answers (2)
  1. 8 September, 19:43
    0
    -3 (4) + 9y=-57

    -12+9y=-57

    9y=-45

    y=-5
  2. 8 September, 20:03
    0
    -12 + 9y = - 57

    add 12 to both sides, 9y = - 45

    divide 9 from both sides to isolate the y

    y = - 5
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