Ответ:
(1/4+3/4x):0,45=25/36
1/4+3/4x=25/36 * 9/20
1/4+3/4x=5/16
3/4x=5/16-1/4
3/4x=1/16
x=1/12
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Ответ:
(1/4+3/4x):0,45=25/36
1/4+3/4x=25/36 * 9/20
1/4+3/4x=5/16
3/4x=5/16-1/4
3/4x=1/16
x=1/12