Solve for x
x = \frac{7}{3} = 2\frac{1}{3} \approx 2.333333333
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400+600x=1800
Swap sides so that all variable terms are on the left hand side.
600x=1800-400
Subtract 400 from both sides.
600x=1400
Subtract 400 from 1800 to get 1400.
x=\frac{1400}{600}
Divide both sides by 600.
x=\frac{7}{3}
Reduce the fraction \frac{1400}{600} to lowest terms by extracting and canceling out 200.
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