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12 March, 04:25

Solve by elimination.

12.5x+8y+10z=1925

x+y+z=200

2y=x

+3
Answers (1)
  1. 12 March, 05:05
    0
    12.5 (2y) + 8y + 10 (200-y-2y) = 1925

    23y + 8y + 2000 - 30y = 1925

    y + 2000 = 1925

    y = - 75

    x = - 150

    z = 425
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