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
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