The x-intercept ocurrs at y=0. Then, by substituting y=0 in our expression, we get
[tex]4x-5(0)=40[/tex]which gives
[tex]4x=40[/tex]by moving the coefficient of x to the right hand side, we have
[tex]\begin{gathered} x=\frac{40}{4} \\ x=10 \end{gathered}[/tex]then, the answer is x=10, which corresponds to the first option