Решите уравнение (1/4+3/4x):0,45=25/36
1/4+3/4х=25/36×0,45=5/16 1/4+3/4х=5/16 3/4х=5/16-1/4=1/16 3/4х=1/16 х=1/16÷3/4=1/12 х=1/12