Решите уравнения: 5(х – 4,4) = 9x; 2 + 4(5-2x)=8.

Решаем:

1. 5(x – 4,4) = 9x

   5x - 22 = 9x

   9x - 5x = -22

   4x = -22

   x = -22/4 = -5,5

2. 2 + 4(5 - 2x) = 8

   2 + 20 - 8x = 8

   -8x = 8 - 2 - 20

   -8x = -14

   x = -14 / -8 = 1,75

Ответ: 1) x = -5,5; 2) x = 1,75