Пошаговое объяснение:
3(2х-5) = 18;
6x - 15 = 18
6x = 18+15
6x = 33
x = 33:6
x = 5,5
-2(1,2х – 5) +4,5 = 3,6х – 9
-2,4x + 10 + 4,5 = 3,6x - 9
-2,4x + 14,5 = 3,6x - 9
3,6x + 2,4x = 14,5 + 9
6x = 23,5
x = 23,5 : 6
x = 3 11/12
Пошаговое объяснение:
3(2х-5) = 18;
6x - 15 = 18
6x = 18+15
6x = 33
x = 33:6
x = 5,5
-2(1,2х – 5) +4,5 = 3,6х – 9
-2,4x + 10 + 4,5 = 3,6x - 9
-2,4x + 14,5 = 3,6x - 9
3,6x + 2,4x = 14,5 + 9
6x = 23,5
x = 23,5 : 6
x = 3 11/12