`#P.Vy`
`y:0,25+y:0,5+y:0,01=53`
`y×4+y×2+y×100=53`
`y×(4+2+100)=53`
`y×106=53`
`y=53:106`
`y=1/2`
\(y:0,25+y:0,5+y:0,01=53\)
\(y\times4+y\times2+y\times100=53\)
\(y\times\left(100+4+2\right)=53\)
\(y\times106=53\)
\(y=53:106\)
\(y=\)\(\dfrac{1}{2}\)
y : 0,25 + y : 0,5 + y : 0,01 = 53
y x 4 + y x 2 + y x 100 = 53
y x (4 + 2 + 100) = 53
y x 106 = 53
y = 53/106