Respuesta :

We have the next equation

[tex]10+15x-30=40[/tex]

We sum similar terms

[tex]15x-20=40[/tex]

then we clear x

[tex]\begin{gathered} 15x=40+20 \\ 15x=60 \\ x=\frac{60}{15} \\ x=4 \end{gathered}[/tex]

the value of x=4