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Solve for x (complex solution)
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72+18x+33x\times 6\times 6x+27-45y=900
Multiply both sides of the equation by 9.
72+18x+33x^{2}\times 6\times 6+27-45y=900
Multiply x and x to get x^{2}.
72+18x+198x^{2}\times 6+27-45y=900
Multiply 33 and 6 to get 198.
72+18x+1188x^{2}+27-45y=900
Multiply 198 and 6 to get 1188.
99+18x+1188x^{2}-45y=900
Add 72 and 27 to get 99.
18x+1188x^{2}-45y=900-99
Subtract 99 from both sides.
18x+1188x^{2}-45y=801
Subtract 99 from 900 to get 801.
1188x^{2}-45y=801-18x
Subtract 18x from both sides.
-45y=801-18x-1188x^{2}
Subtract 1188x^{2} from both sides.
\frac{-45y}{-45}=\frac{801-18x-1188x^{2}}{-45}
Divide both sides by -45.
y=\frac{801-18x-1188x^{2}}{-45}
Dividing by -45 undoes the multiplication by -45.
y=\frac{132x^{2}+2x-89}{5}
Divide 801-18x-1188x^{2} by -45.