Add 4x and 7x.
Move all terms not containing x to the right side of the equation.
Subtract 9 from both sides of the equation.
Subtract 9 from 31.
Divide each term by 11 and simplify.
Divide each term in 11x=22 by 11.
Cancel the common factor of 11.
Cancel the common factor.
Divide x by 1.
Divide 22 by 11.
Solve for x 4x+9+7x=31