Final answer:
To correct the linear equation 4x + 12 - x = -15, simplify by combining like terms and solve for x, resulting in x = -9.
Step-by-step explanation:
Given the equation 4x + 12 - x = -15, we can simplify it by combining like terms. The variable term 4x and -x can be combined to give us 3x. The equation then becomes 3x + 12 = -15. To solve for x, we can subtract 12 from both sides of the equation, resulting in 3x = -27. Finally, divide both sides of the equation by 3 to isolate x, giving us the solution x = -9.