Solve for x
x=10
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300x+40\left(145-7x\right)=6000
Multiply both sides of the equation by 5.
300x+5800-280x=6000
Use the distributive property to multiply 40 by 145-7x.
20x+5800=6000
Combine 300x and -280x to get 20x.
20x=6000-5800
Subtract 5800 from both sides.
20x=200
Subtract 5800 from 6000 to get 200.
x=\frac{200}{20}
Divide both sides by 20.
x=10
Divide 200 by 20 to get 10.
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