Solve for w
w=2
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7w-9+4w=13
Add 4w to both sides.
11w-9=13
Combine 7w and 4w to get 11w.
11w=13+9
Add 9 to both sides.
11w=22
Add 13 and 9 to get 22.
w=\frac{22}{11}
Divide both sides by 11.
w=2
Divide 22 by 11 to get 2.
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