Move all terms containing w to the left side of the equation.
Subtract 4w from both sides of the equation.
Subtract 4w from 7w.
Add 9 to both sides of the equation.
Divide each term by 3 and simplify.
Divide each term in 3w=9 by 3.
Cancel the common factor of 3.
Cancel the common factor.
Divide w by 1.
Divide 9 by 3.
Solve for w 7w-9=4w