Solve for xxx in terms of aaa, bbb, ccc: x−ab=x+bc\frac{x - a}{b} = \frac{x + b}{c}bx−a=cx+b (assume b≠cb \neq cb=c).
x=ab+b2c−bx = \frac{ab + b^2}{c - b}x=c−bab+b2
x=ac+b2c−bx = \frac{ac + b^2}{c - b}x=c−bac+b2
x=a+bc−bx = \frac{a + b}{c - b}x=c−ba+b
x=b2−acb−cx = \frac{b^2 - ac}{b - c}x=b−cb2−ac