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92400+42x=30\left(600-\frac{1600+x}{6}\right)
Multiply both sides of the equation by 42, the least common multiple of 7,6.
92400+42x=18000+30\left(-\frac{1600+x}{6}\right)
Use the distributive property to multiply 30 by 600-\frac{1600+x}{6}.
92400+42x=18000-5\left(1600+x\right)
Cancel out 6, the greatest common factor in 30 and 6.
92400+42x=18000-8000-5x
Use the distributive property to multiply -5 by 1600+x.
92400+42x=10000-5x
Subtract 8000 from 18000 to get 10000.
92400+42x+5x=10000
Add 5x to both sides.
92400+47x=10000
Combine 42x and 5x to get 47x.
47x=10000-92400
Subtract 92400 from both sides.
47x=-82400
Subtract 92400 from 10000 to get -82400.
x=\frac{-82400}{47}
Divide both sides by 47.
x=-\frac{82400}{47}
Fraction \frac{-82400}{47} can be rewritten as -\frac{82400}{47} by extracting the negative sign.