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xx-a-bx=cx
Multiply both sides of the equation by x.
x^{2}-a-bx=cx
Multiply x and x to get x^{2}.
-a-bx=cx-x^{2}
Subtract x^{2} from both sides.
-a=cx-x^{2}+bx
Add bx to both sides.
-a=cx+bx-x^{2}
The equation is in standard form.
\frac{-a}{-1}=\frac{x\left(c+b-x\right)}{-1}
Divide both sides by -1.
a=\frac{x\left(c+b-x\right)}{-1}
Dividing by -1 undoes the multiplication by -1.
a=-x\left(c+b-x\right)
Divide x\left(c-x+b\right) by -1.
xx-a-bx=cx
Multiply both sides of the equation by x.
x^{2}-a-bx=cx
Multiply x and x to get x^{2}.
-a-bx=cx-x^{2}
Subtract x^{2} from both sides.
-bx=cx-x^{2}+a
Add a to both sides.
\left(-x\right)b=a+cx-x^{2}
The equation is in standard form.
\frac{\left(-x\right)b}{-x}=\frac{a+cx-x^{2}}{-x}
Divide both sides by -x.
b=\frac{a+cx-x^{2}}{-x}
Dividing by -x undoes the multiplication by -x.
b=x-c-\frac{a}{x}
Divide cx-x^{2}+a by -x.