Literal Equations
Solve the following equations for the given variable.

a+b=c  for  b\displaystyle {a}+{b}={c}\ \text{ for }\ {b}

Answer:
 
rt=w  for  r\displaystyle {r}{t}={w}\ \text{ for }\ {r}

Answer:
 
v+wx=y  for  w\displaystyle {v}+{w}-{x}={y}\ \text{ for }\ {w}

Answer:
 
2bh=v  for  b\displaystyle {2}{b}{h}={v}\ \text{ for }\ {b}

Answer: