Simplify:frac{3}{10} div frac{3}{7} text{ of | vedclass

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(C) Given expression: $\frac{3}{10} \div \frac{3}{7} 	ext{ of } \left(\frac{23}{10} + \frac{13}{5}ight) + \frac{1}{5} \div \frac{7}{5} - \frac{2}{7

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(C) Given expression: $\frac{3}{10} \div \frac{3}{7} 	ext{ of } \left(\frac{23}{10} + \frac{13}{5}ight) + \frac{1}{5} \div \frac{7}{5} - \frac{2}{7}$First,solve the bracket: $\frac{23}{10} + \frac{26}{10} = \frac{49}{10}$Now,the expression is: $\frac{3}{10} \div \left(\frac{3}{7} 	imes \frac{49}{10}ight) + \left(\frac{1}{5} 	imes \frac{5}{7}ight) - \frac{2}{7}$$= \frac{3}{10} \div \frac{21}{10} + \frac{1}{7} - \frac{2}{7}$$= \left(\frac{3}{10} 	imes \frac{10}{21}ight) + \left(\frac{1-2}{7}ight)$$= \frac{1}{7} - \frac{1}{7} = 0$

Simplify:
$\frac{3}{10} \div \frac{3}{7} \text{ of } \left(2 \frac{3}{10} + 2 \frac{3}{5}\right) + \frac{1}{5} \div 1 \frac{2}{5} - \frac{2}{7}$

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Simplify:$\frac{3}{10} \div \frac{3}{7} \text{ of } \left(2 \frac{3}{10} + 2 \frac{3}{5}\right) + \frac{1}{5} \div 1 \frac{2}{5} - \frac{2}{7}$