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20 October, 04:20

15 - t + 8t = - 13

4a + 11 - a = 2

+3
Answers (2)
  1. 20 October, 04:46
    0
    15-t + 8t = - 13

    15 + 7t = - 13

    7t = - 13-15

    7t = - 28

    t = - 4

    4a + 11-a = 2

    3a = 2-11

    3a = - 9

    a = - 3
  2. 20 October, 05:13
    0
    Remember you can do anything to an equation as long as you do it to both sides

    15-1t+8t=-13

    15+7t=-13

    minus 15 both sides

    7t=-28

    divide both sides by 7

    t=-4

    4a+11-1a=2

    3a+11=2

    minus 11 both sides

    3a=-9

    divide by 3 both sides

    a=-3
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