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13 December, 01:10

Solve the system of equations, if there are infinitely many solutions write answers in terms of z.

x+4y-2z=-3

2x-y+5z=12

8x+5y+11z=30

x=

y=

z=

+2
Answers (1)
  1. 13 December, 01:30
    0
    First multiply the first one by 5 and the second one by 2

    5x+20y-10z=-15

    4x-2y+10z=24

    sum them

    9x+18y=9

    x+2y=1
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