Question

me ajudem por favor? ????

Answer 1

$\frac{A}{5} = \frac{16}{20}$
A.20=5.16
20A=80
A=$\frac{80}{20}$
A=4



$\frac{6}{B} = \frac{3}{7}$
6.7=B.3
42=3B
$\frac{42}{3} =B$
14=B


$\frac{81}{C} = \frac{9}{13} = \frac{D}{39}$

$\frac{81}{C}= \frac{9}{13}$
81.13=C.9
1053=9C
$\frac{1053}{9} = C       117=C [tex] \frac{9}{13}= \frac{D}{39}$
9.39=13.D
351=13D
$\frac{351}{13}$=D
27=D



$\frac{6}{11}= \frac{48}{E} = \frac{F}{33}$

$\frac{6}{11}= \frac{48}{E}$
6.E=11.48
6E=528
E=$\frac{528}{6}$
E=88

$\frac{6}{11}= \frac{F}{33}$
6.33=11.F
198=11F
$\frac{198}{11}$=F
18=F