Question

найдите корень уравнения n+4/6=3n-2/7

Answer 1

-2n=-(6+14)/21
-2n=20/21
n=20/42
n=10/21

Answer 2

4/6+2/7=3п-п
28/42+12/42=2п
40/42=2п
п=20/42=10/21