Solving an equation like this

3x-4=18+5x

3x-4=18+5x

subtract - 5x both sides

-2x-4=18

add 4 to both sides

-2x=22

divide by negative to both sides

final answer x=-11

3x-4=18+5x

You would simplify the equation to the form, which is simple to understand

3x-4=18+5x

Then, move all terms with x to the left and all other terms to the right.

+3x-5x=+18+4

We simplify left and right side of the equation.

-2x=+22

Lastly, divide both sides of the equation by - 2 to get x.

x=-11