1) х+101/х+7=13 2) 5 (8x+4)+1>26x+147 3)-4- 18\x-1= -x 4)-x-10=58\x-6

Question

1) х+101/х+7=13
2) 5 (8x+4)+1>26x+147
3)-4- 18\x-1= -x
4)-x-10=58\x-6

Comments

3 точно правильный?

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да

Answer 1

1) (x+101)/(x+7) = 13
     x + 101 = 13 x + 91
     12x = 10
      x = 5/6

2) 5 ( 8x+4 ) + 1> 26x + 147 
     40 x + 20 + 1 - 26x >147
     14x > 147 - 20 - 1
      x>9
3) -22 = х - x^2
     x^2 - x- 22 = 0
      D = 89
      x1 =
      x2 = 
4) (x-6)(-x-10) = 58
     -x^2 - 4x + 2 = 0
      x^2 + 4x - 2 = 0
      D = 24
      x1 = (-4-2√6)/2 = -2 -√6
      x2 = -2 + √6