Question

15-Complete as frações para que se tornem equivalentes:
A) 3= [9]
6 [ ]
B) 2 = [6]
5 [ ]
C) 15=[ ]
45 [ ]
Continua....

Answer 1

a)
$\frac{3}{6} = \frac{9}{x} \\ \\ 3x=54 \\ x=54\div3 \\ x=18 \\ \\ \frac{3}{6} = \frac{9}{18}$

b)
$\frac{2}{5} = \frac{6}{x } \\ \\ 2x=5.6 \\ 2x=30 \\ x=30\div2 \\ x=15 \\ \\ \frac{2}{5} = \frac{6}{15}$

c)
$\frac{15}{45} = \frac{5}{x} \\ \\ 15x=45.5 \\ 15x=225 \\ x=225\div15 \\ x=15 \\ \\ \frac{15}{45} = \frac{5}{15}$