(3 5/18 - 7 1/12 + 2 5/9): 1.9-1.5 just help me,мозги не варят

5}{36}): \frac{19}{10} " alt=" \frac{15}{10}= \frac{45*10}{36*19} - \frac{15}{10} = \frac{5*10}{4*19} - \frac{3}{2}= \frac{5*5}{2*19}- \frac{3}{2} = \frac{25-57}{38} = - \frac{32}{38}=- \frac{16}{19}" />5}{36}): \frac{19}{10} " />
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