Решите систему 3x+8y=16 2x-4y=36. Created by nairamkrtchyan. algebra-ru

Решите систему 3x+8y=16 2x-4y=36...

July 2022 1 1 Report

Решите систему
3x+8y=16
2x-4y=36

Answers & Comments

mshozhamuratova 3x+8y= 16
2x-4y= 36 | :2

3x+8y= 16
x-2y= 18 => x= 18+2y

3(18+2y)+8y= 16
54+6y+8y= 16
14y= 16-54
14y= -38
38   10
y= - --- = -2----
14   14

  5
y= -2--
  7

2 19 3 4
x= 18+2y= 18+ -- * - --- = 18- 5-- = 13--
1   7 7 7

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