Question

с+4/6=3с-2/7
Найдите корень уравнения

Answer 1

с-3с=-4/6-2/7
-2с=-20/21
с=10/21

Answer 2

3c - c = 4/6 + 2/7

2c = (28 + 12)/42

2с = 40/42

с = 20/42 = 10/21