\(\Leftrightarrow\left(6,45+3,55\right)\times y=20180\)
\(\Leftrightarrow10\times y=20180\)
\(\Leftrightarrow y=20180:10\)
\(\Leftrightarrow y=2018\)
= y. ( 6,45 + 3,55 ) = 20180
= 10y = 20180
=> y = 2018
dấu chấm (.) là dấu nhân nhé
\(6,45\cdot y+y\cdot3,55=20180\)
\(y\cdot\left(6,45+3,55\right)=20180\)
\(y\cdot10=20180\)
\(y=20180:10\)
\(y=2018\)
\(6,45.Y+Y.3,55=20180\)
\(\Rightarrow y.\left(6,45+3.55\right)=20180\)
\(\Rightarrow y.10=20180\)
\(\Rightarrow y=20180:10=2018\)
