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

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