\(y\times\dfrac{1}{10}+y\times9,9=30,2\)
=>\(y\times0,1+y\times9,9=30,2\)
=>\(y\times\left(0,1+9,9\right)=30,2\)
=>10y=30,2
=>y=30,2:10=3,02
y x \(\dfrac{1}{10}\) + y x 9,9 = 30,2
y x ( \(\dfrac{1}{10}\) + 9,9 ) = 30,2
y x 10 = 30,2
y = 30,2 : 10
y = 3,02