We are given the equation 3x + 4 = 140 + 8x + 4, and are told to solve for the variable 'x'. First off, we can combine like terms on the right-hand side of the equation, giving us 3x + 4 = 144 + 8x. Next, we can subtract 8x from both sides, resulting in -5x + 4 = 144. Then, we can subtract 4 from both sides, simplifies the equation down to -5x = 140. Finally, divide both sides by -5, giving us x = -28. Therefore, the solution to the equation is x = -28. Hope this helped!