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21 September, 19:02

Solve system of equation

x-y=11

2x+y=19

+3
Answers (1)
  1. 21 September, 19:11
    0
    (10, - 1)

    Step-by-step

    the y's cancel

    3x = 30

    x = 10

    10 - y = 11

    - y = 1

    y = - 1
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