Solve for x
x=200
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0x^{2}+90x-18000=0
Multiply 0 and 1 to get 0.
0+90x-18000=0
Anything times zero gives zero.
-18000+90x=0
Subtract 18000 from 0 to get -18000.
90x=18000
Add 18000 to both sides. Anything plus zero gives itself.
x=\frac{18000}{90}
Divide both sides by 90.
x=200
Divide 18000 by 90 to get 200.
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