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91000-4150x
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91000-4150x
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400x+4550\left(20-x\right)
Multiply 10 and 40 to get 400. Multiply 35 and 130 to get 4550.
400x+91000-4550x
Use the distributive property to multiply 4550 by 20-x.
-4150x+91000
Combine 400x and -4550x to get -4150x.
400x+4550\left(20-x\right)
Multiply 10 and 40 to get 400. Multiply 35 and 130 to get 4550.
400x+91000-4550x
Use the distributive property to multiply 4550 by 20-x.
-4150x+91000
Combine 400x and -4550x to get -4150x.
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