Найдите корень уравнения: (13x - 15) - (9 + 6x) = -3x; 1,6x -(х- 2,8) = (0,2x + 1,5) - 0,7.

(13x - 15) - (9 + 6x) = -3x
13x - 6x + 3x = 15 + 9
16x - 6x = 24
10x = 24
x = 24/10
x = 2,4

1,6x -(х- 2,8) = (0,2x + 1,5) - 0,7
1.6x - x + 2.8 = 0.2x + 1.5 - 0.7
0.6x + 2.8 = 0.2x + 0.8
0.6x - 0.2x = 0.8 - 2.8
0.4x = - 2
x = - 5