Question

solve for b: (x/a)+(y/b)+(z/c)=1

Answer 1

\[1-\frac{z}{c}-\frac{x}{a}=\frac{y}{b}\]
Now get the inverse of both sides:
\[\frac{b}{y}=\frac{1}{1-\frac{z}{c}-\frac{x}{a}}\]
Times both sides by y:
\[b=\frac{y}{1-\frac{z}{c}-\frac{x}{a}}\]