Реши уравнение
2) 300 - х *5 = 210
4) (300 - х) * 5 = 210
5) (300 - 18) * х = 1410
6) (150 - 20) : х = 65
7) 5 * х - 600 = 900
8) (х + 4) * 7 = 350

Спасибо

2) 300 - х*5 = 210;- х*5 = 210 - 300;- х*5 = - 90;х = -90/(-5).х = 18.4) (300 - х)*5 = 210.(300 - х)*5/5 = 210/5;300 - х = 42;- х = 42 - 300;х = -258/(-1);х = 258.5) (300 - 18)*х = 1410;282*х = 1410;х = 1410/282;х = 5.6) (150 - 20):х = 65;130:х = 65.х = 130/65;х = 2.7) 5*х - 600 = 900;5*х = 900 + 600;5*х = 1500;х = 1500/5;х = 300.8) (х + 4)*7 = 350;(х + 4)*7/7 = 350/7;х + 4 = 50;х = 50 - 4;х = 46.