Question

8/9=4x/27?
0.25/4× +1 =0.3/8.4?
6/7 =10×/21?

Answer 1

$frac{8}{9} = frac{4x}{27} \ 8*27=4x *9\ x= frac{8*27}{9*4} \ x= frac{2*3}{1} \ x=6.$

$frac{6}{7}= frac{10x}{21} \ 10x*7=6*21 \ x= frac{6*21}{10*7} \ x= frac{9}{5} \ x=1.8$