Solve for w
w=1080
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w\left(15+6\right)=2100\times 1.2\times 9
Variable w cannot be equal to 0 since division by zero is not defined. Multiply both sides of the equation by 2100w, the least common multiple of 2100,w.
w\times 21=2100\times 1.2\times 9
Add 15 and 6 to get 21.
w\times 21=2520\times 9
Multiply 2100 and 1.2 to get 2520.
w\times 21=22680
Multiply 2520 and 9 to get 22680.
w=\frac{22680}{21}
Divide both sides by 21.
w=1080
Divide 22680 by 21 to get 1080.
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