Question

if x:5::4:20 then x =?​

Answer 1

The question is from ratios

$\\ \sf\longmapsto x:5::4:20$

$\\ \sf\longmapsto x:5=4:20$

$\\ \sf\longmapsto \dfrac{x}{5}=\dfrac{4}{20}$

• Using cross multiplication

$\\ \sf\longmapsto 20x=4(5)$

$\\ \sf\longmapsto 20x=20$

$\\ \sf\longmapsto x=\dfrac{20}{20}$

$\\ \sf\longmapsto x=1$

Answer 2

Step-by-step explanation:

x= 1

Equation = x *20=4*5

=x=4*5/20

x=20/20

x =1

hence x=1