Question

aflati x din proportiile: 2 supra 1=20supra x;  x supra0,2=0,2supra0,01

Answer 1

2/1=20/x
x*2=20*1=20
x=20/2=10

x/0,2=0,2/0,01
x*0,01=0,2*0,2=0,04=4/100
x=4/100:0,1=4/100*1/0,1=4/10

Answer 2

$\frac{2}{1} = \frac{20}{x}-> 2x=20->x=10$