Solve for w
w\geq 9
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\frac{72}{8}\leq w
Divide both sides by 8. Since 8 is positive, the inequality direction remains the same.
9\leq w
Divide 72 by 8 to get 9.
w\geq 9
Swap sides so that all variable terms are on the left hand side. This changes the sign direction.
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