The simplified form of the expression [tex]3-\frac{y}{2}[/tex]
Given the expression
2/5y - 4 + 7 - 9/10y
Collect the like terms;
[tex]\frac{2}{5} y - 4 + 7 - \frac{9}{10} y\\\frac{2}{5} y -\frac{9}{10} y-4+7\\\frac{2(2y)-9y}{10} +3\\\frac{4y-9y}{10}+3\\\frac{-5y}{10} +3\\\frac{-y}{2} +3[/tex]
Hence the simplified form of the expression [tex]3-\frac{y}{2}[/tex]
Learn more here: https://brainly.com/question/17788156