3/10
Explanation:[tex]-2x(-5)\text{ = 3}[/tex]Multiplication of same sign gives positive number. Multiplication of opposite signs give negative number.
[tex]\begin{gathered} -2\times-5\text{ = 10} \\ -2x\times-5\text{ = 10x} \end{gathered}[/tex][tex]\begin{gathered} 10x\text{ = 3} \\ \text{divide both sides by coefficient of x} \\ \text{coefficient of x = 10} \\ \frac{10x}{10}=\frac{3}{10} \end{gathered}[/tex][tex]x\text{ = 3/10}[/tex]