Реши уравнение 3/4 -(х+1/20)=1/5
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
спасибо большое!
Ок!
3/4-1/5=х+1/20 11/20=х+1/20 х=10/20 х=1/2