Question

Me ajudem por favor...

Answer 1

Explicação passo-a-passo:

$\frac{ \frac{1}{2} - \frac{1}{3} + \frac{1}{4} }{ \frac{2}{3} + \frac{3}{4} } \div ( \frac{9}{17} + \frac{1}{4} ) = \\ \\ \frac{ \frac{(6 \times 1) - (4 \times 1) + (3 \times 1)}{12} }{ \frac{(4 \times 2) + ( 3 \times 3)}{12} } \div \frac{(4 \times 9) + (17 \times 1)}{68} = \\ \\ \frac{ \frac{6 - 4 + 3}{12} }{ \frac{8 + 9}{12} } \div \frac{36 + 17}{68} = \\ \\ \frac{ \frac{2 + 3}{12} }{ \frac{17}{12} } \div \frac{53}{68} = \\ \\ \frac{5}{12} \times \frac{12}{17} \div \frac{53}{68} = \\ \\ \frac{5}{17} \div \frac{53}{68} = \\ \\ \frac{5}{17} \times \frac{68}{53} = \\ \\ \frac{5 \times 4}{53} = \\ \\ \frac{20}{53}$