Quandaries
and Queries 

Solve for z when 4x + 10yz = 0 solve for z if y^{2} + 3yz  8z  4x = 0? Do I have to solve all of the variables in order to get z? 

Hi, You just solve for z treating the other variables and numbers as symbols. For example in the first problem add 4x to each side to get
Next divide both sides by 10y to get
Now try the second problem. Penny 

