5 * 2x - 5 * 3 - 2 * 3 + 2 * 2x = 15 - 6 * x - 6 * 1;
10x - 15 - 6 + 4x = 15 - 6x - 6;
10x + 4x + 6x = 15 - 6 + 6 + 15;
20x = 30;
x = 30 : 20;
x = 1.5.
ответ: x = 1.5.
5 * 2x - 5 * 3 - 2 * 3 + 2 * 2x = 15 - 6 * x - 6 * 1;
10x - 15 - 6 + 4x = 15 - 6x - 6;
10x + 4x + 6x = 15 - 6 + 6 + 15;
20x = 30;
x = 30 : 20;
x = 1.5.
ответ: x = 1.5.