Question

реши уравнение 3/4 -(х+1/20)=1/5

Answer 1

3/4-1/5=х+1/20
11/20=х+1/20
х=10/20
х=1/2

Answer 2

3/4 - (х + 1/20) = 1/5
х + 1/20 = 3/4 - 1/5
х + 1/20 = 15/20 - 4/20
х = 11/20 - 1/20
х = 10/20 = 1/2

Проверка
3/4 - (1/2 + 1/20) = 1/5
3/4 - (1/2 + 1/20) = 1/5
15/20 - (10/20 + 1/20) = 1/5
15/20 - 11/20 = 1/5
4/20 = 1/5
1/5 = 1/5
 

Answer 3

Ок!