Все кроме 5 пожалуйста

$5 \frac{2}{7} = \frac{37}{5}$
$3 \frac{5}{16} = \frac{53}{16}$
$8 \frac{9}{12} = \frac{105}{12}$
$4 \frac{7}{13} = \frac{59}{13}$
№2 $\frac{74}{6}= 12 \frac{1}{3} ; \frac{52}{7} =7 \frac{3}{7} ; \frac{93}{15} =6 \frac{1}{5} ; \frac{87}{11}= 7 \frac{10}{11}$
№3
$12 \frac{7}{14} +6 \frac{15}{14}=19 \frac{8}{14} =19 \frac{4}{7}$
$19-6 \frac{5}{18}=13 \frac{13}{18}$
$9 \frac{6}{14} -3 \frac{9}{14}=8 \frac{20}{14}-3 \frac{9}{14} =5 \frac{11}{14}$
4.
$\frac{45}{x-6}=8;$
8(x-6)=45
8x-48=45
$x=11 \frac{5}{8}$
б)(2х+12):7=13
(2х+12)=13*7
2х+12=91
2х=91-12
х=79:2
$x=39 \frac{1}{2}$