1. Решите уравнение: a) 17x-34=-170; B) 5(x-6) = 15(x-8); 6) 7x + 5 = 9x-11; 5 2 r)-=- y-2_3y-4 8 3

Решение уравнения:

1. а) 17x - 34 = -170
   17x = -170 + 34
   17x = -136
   x = -136/17
   x = -8
2. б) 7x + 5 = 9x - 11
   7x - 9x = -11 - 5
   -2x = -16
   x = -16 / -2
   x = 8
3. в) 5(x - 6) = 15(x - 8)
   5x - 30 = 15x - 120
   5x - 15x = -120 + 30
   -10x = -90
   x = -90 / -10
   x = 9
4. г) \[\frac{5}{y-2} = \frac{2}{3y-4}\]
   5(3y-4) = 2(y-2)
   15y - 20 = 2y - 4
   15y - 2y = -4 + 20
   13y = 16
   y = 16/13
   y = 1.23
5. д) \[\frac{y-1}{8} = \frac{y-2}{3}\]
   3(y-1) = 8(y-2)
   3y - 3 = 8y - 16
   3y - 8y = -16 + 3
   -5y = -13
   y = -13 / -5
   y = 2.6