Question

求比的未知项。 x:1.3=4 20:x=0.5 x:12.5=4分之1 0.3:x=9分之4

Answer 1

X:1.3=4X=4*1.3X=5.2 20:X=0.5X=20/0.5X=40 X:12.5=1/4X=12.5*1/4X=3.125 0.3:X=4/9X=0.3/(4/9)X=27/40