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6 July, 12:00

Solve the given system of equations-remember substitution/elimination methods.

-8a=12

4a+8c=0

7b+1c=18

+1
Answers (2)
  1. 6 July, 15:49
    0
    -8a = 12

    a = 12/-8

    a = - 3/2

    4a+8c=0

    4 (-3/2) + 8c = 0

    -6+8c = 0

    8c = 6

    c = 6/8

    c = 3/4

    7b+c=18

    7b+3/4 = 18

    7b = 17 1/4 = 69/4

    b = 69/28

    a = - 3/4, b = 69/28, c = 3/4
  2. 6 July, 15:55
    0
    1.) 1.5 because 12/-8 = 1.5
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