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31 January, 13:21

Solve the system by substitution.

-2x=3y=9

-x=y

+5
Answers (1)
  1. 31 January, 13:29
    0
    -2x=3y (we have 9 more) = 9

    -4 = 5 x=-4 = 9 as - 4+5=1

    -2x=3y = 1

    = + -4 + 4 = 8 + 1 = 9

    y=5

    As - 2x=3y = 1

    = + -4 + 4 = 8 + 1 = 9

    + 5 + 5 + 5 = 15
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