[tex]\begin{gathered} \text{let the unknown variable be c} \\ Eight\text{ times the number means: 8c} \\ \text{The sum of 8times the number and 5 means: 8c + 5} \\ The\text{ sum gives 3 means : 8c + 5 = 3 --------(1)} \\ \text{therefore solving equation(1) for the unknown c} \\ \text{ 8c + 5 = 3 } \\ \text{ 8c = 3-5} \\ \text{ 8c = -2} \\ \text{ c = }\frac{-2}{8}\text{ = }\frac{-1}{4} \end{gathered}[/tex]
