1) 0,6 – 1,6(x – 4) = 3(7 – 0,4x)
Раскроем скобки:
0,6 - 1,6x + 6,4 = 21 - 1,2x
-1,6x + 1,2x = 21 - 0,6 - 6,4
-0,4x = 14
x = 14 : (-0,4)
x = -35
2) \frac{x-2}{x-7} = \frac{5}{8}
8(x - 2) = 5(x - 7)
8x - 16 = 5x - 35
8x - 5x = -35 + 16
3x = -19
x = -\frac{19}{3} = -6\frac{1}{3}
Ответ: 1) x = -35; 2) x = -6\frac{1}{3}