What is the answer to 3x+y=12

Simplifying 3x + - 1y = 12 Solving 3x + - 1y = 12 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add 'y' to each side of the equation. 3x + - 1y + y = 12 + y Combine like terms: - 1y + y = 0 3x + 0 = 12 + y 3x = 12 + y Divide each side by '3'. x = 4 + 0.3333333333y Simplifying x = 4 + 0.3333333333y