17 1/4 - x = 7 11/12
69/4 - x = 95/12
-x = 95/12 -69/4
-x = -28/3
x = 28/3, то есть
x = 9 1/3
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17 1/4 - x = 7 11/12
69/4 - x = 95/12
-x = 95/12 -69/4
-x = -28/3
x = 28/3, то есть
x = 9 1/3