16 + 4x + 2x - 3x + x = 0 First, simplify 16 + 4x + 2x - 3x + x to get 16 + 4x. / Your problem should look like: 16 + 4x = 0 Second, subtract 16 from both sides. / Your problem should look like: 4x = -16 Third, divide both sides by 4. / Your problem should look like: x = Fourth, simplify to get 4. / Your problem should look like: x = -4