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just olya [345]
3 years ago
11

2x + 3y- z = 13 3x - 4y+z = -2 x + 2y + 2z= 21

Mathematics
2 answers:
Oksana_A [137]3 years ago
8 0
What’s the question ?
11111nata11111 [884]3 years ago
8 0

Answer:

17

Step-by-step explanation:

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How do I solve x+4y=22<br> -x+5y=23
xxTIMURxx [149]
{ x + 4y = 22     ( + x - x = 0 )
{ - x + 5y = 23

4y + 5y = 22 + 23
9y = 45
  y =<u> 45 </u>
         9
  y = 5

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S = { 2 , 5 }


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2 years ago
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