Question

Am nevoie de ajutor!! va rog​

Answer 1

Răspuns:

a)

$\frac{7 \times 13 - 7 \times 9}{24 + 24 \times \frac{39}{8} } = \frac{x \times 7}{ \frac{4}{9 } \times \frac{27}{10} } =$

$\frac{91 - 63}{24 + 3 \times 39} = \frac{x \times 7}{2 \times \frac{3}{5} } =$

$\frac{28}{141} = \frac{35x}{6}$

$168 = 4935x$

$4935x = 168$

$x = \frac{8}{235}$

b)

$\frac{x}{ \frac{30}{7} - \frac{4}{3} } = \frac{26 - 2 \sqrt{149} }{ \frac{18}{25} }$

$\frac{x}{ \frac{62}{21} } = \frac{(26 - 2 \sqrt{149}) \times 25 }{18}$

$\frac{21x}{62} = \frac{2(13 - \sqrt{149}) \times 25 }{18}$

$\frac{21x}{62} = \frac{(13 - \sqrt{149}) \times 25 }{9}$

$\frac{21x}{62} = \frac{325 - 25 \sqrt{149} }{9}$

$189x = (325 - 25 \sqrt{149} ) \times 62$

$189x = 20150 - 1550 \sqrt{149}$

$x = \frac{20150}{189} - \frac{1550 \sqrt{149} }{189}$

$x = \frac{20150 - 1550 \sqrt{149} }{189}$

Sper că te-am ajutat!