Question

please see message ,

Answer 1

\[\frac{ x }{ 20-x } = \frac{ 1 }{ 4 }\]

Answer 2

\[4x = 20 - x \]

Answer 3

what now ?

Answer 4

do this happen,

5x = 20


then
x = 4 ??

Answer 5

Yep, that's correct. :)

Answer 6

Thanks man :)

Answer 7

Cool cool :)