Answer:
[tex]x=10[/tex]Step-by-step explanation:
To solve for x, use inverse operations to solve equations.
Remember that addition and subtraction are inverse operations, as multiplication and division.
[tex]\begin{gathered} 10-3x=2x-8x+40 \\ 8x-3x-2x=40-10 \\ 3x=30 \\ x=\frac{30}{3} \\ x=10 \end{gathered}[/tex]