Move all terms not containing w to the right side of the equation.
Subtract 109 from both sides of the equation.
Subtract 109 from 231.
Multiply each term in -w=122 by -1
Multiply each term in -w=122 by -1.
Multiply -1 by -1.
Multiply w by 1.
Multiply 122 by -1.
Solve for w 109-w=231