(2х+4)*20-85=35решите уравнение
40х+80-85=35; 40х= 35+85-80; 40х=40; х=40:40; х= 1
(2Х+4)*20-85=35 (2Х+4)*20=85+35 (2Х+4)*20=120 2Х+4=120:20 2Х+4=6 2Х=6-4 2Х=2 Х=2:2 Х=1