0.15(x+4)-6=1.2x-21
0.15x + 0.6 – 6 = 1.2x – 21
0,15x – 1,2x = – 21 + 6 – 0,6
-1.05x = -15.6
-105x = -1560
-7x = -104
x = -104/-7
х=14,8571428571
0.15(x+4)-6=1.2x-21
0.15x + 0.6 – 6 = 1.2x – 21
0,15x – 1,2x = – 21 + 6 – 0,6
-1.05x = -15.6
-105x = -1560
-7x = -104
x = -104/-7
х=14,8571428571