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yx^{2}=x^{2}A+xB+C
Multiply both sides of the equation by x^{2}, the least common multiple of x,x^{2}.
x^{2}A+xB+C=yx^{2}
Swap sides so that all variable terms are on the left hand side.
x^{2}A+C=yx^{2}-xB
Subtract xB from both sides.
x^{2}A=yx^{2}-xB-C
Subtract C from both sides.
x^{2}A=yx^{2}-Bx-C
The equation is in standard form.
\frac{x^{2}A}{x^{2}}=\frac{yx^{2}-Bx-C}{x^{2}}
Divide both sides by x^{2}.
A=\frac{yx^{2}-Bx-C}{x^{2}}
Dividing by x^{2} undoes the multiplication by x^{2}.
A=-\frac{Bx+C}{x^{2}}+y
Divide yx^{2}-xB-C by x^{2}.
yx^{2}=x^{2}A+xB+C
Multiply both sides of the equation by x^{2}, the least common multiple of x,x^{2}.
x^{2}A+xB+C=yx^{2}
Swap sides so that all variable terms are on the left hand side.
xB+C=yx^{2}-x^{2}A
Subtract x^{2}A from both sides.
xB=yx^{2}-x^{2}A-C
Subtract C from both sides.
Bx=-Ax^{2}+yx^{2}-C
Reorder the terms.
xB=yx^{2}-Ax^{2}-C
The equation is in standard form.
\frac{xB}{x}=\frac{yx^{2}-Ax^{2}-C}{x}
Divide both sides by x.
B=\frac{yx^{2}-Ax^{2}-C}{x}
Dividing by x undoes the multiplication by x.
B=xy-Ax-\frac{C}{x}
Divide -Ax^{2}+yx^{2}-C by x.