Найдите корни уравнений 1) 1,2 (x - 5) = 0,2x + 6 2) 1,3 (t - 0,6) = 1,8t 3) 5/7 (x + 3) = -2 (1 - x) 4) 6(4x - 7) - 3 (5 - 8x) = 0 27 по бысстрей

Пошаговое объяснение:

1) 1.2 (x - 5) = 0.2 x +6

1.2x - 6 = 0.2 x +6

1.2 x - 0.2 x = 6 + 6

x = 12

ответ: x =12

2) 1.3(t - 0.6) = 1.8 t

1.3t - 0.78 = 1.8 t

1.3 t - 1.8 t = 0.78

-0.5t = 0.78

t = 0.78 : 0,5

t= 0.39

ответ : t =0.39

3) 5/7 (x + 3) = -2(1 - x)

5/7 x +2 1/7 = -2 + 2 x

5/7 x - 2x = -2 1/7 - 2

-1 2/7 x= - 4 1/7

x = 4 1/7 : 1 2/7

x = 3 2/9

ответ : x = 3 2/9

4) 6(4x - 7) - 3(5 -8x) = 0

24x - 42 -35 + 24x = 0

48x - 77 = 0

48 x = 77

x = 77 : 48

x = 1 29/ 48

ответ : x = 1 29/48