Solve for x
x=-450
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30000-1200\times 100-200x=0
Multiply 600 and 50 to get 30000.
30000-120000-200x=0
Multiply 1200 and 100 to get 120000.
-90000-200x=0
Subtract 120000 from 30000 to get -90000.
-200x=90000
Add 90000 to both sides. Anything plus zero gives itself.
x=\frac{90000}{-200}
Divide both sides by -200.
x=-450
Divide 90000 by -200 to get -450.
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