As an example, in an underdetermined system of linear equations, we can eliminate the number of variables by substituting them.
As an example:
With five variables and three equations, we can reduce the number of variables to two:
Solve a, b, and c and representing them using d and e; essentially substituting a, b, and c with formulas containing d and e.
Now, consider a set of Boolean equations, with five variables and three equations. Can we perform a similar method (representing/substituting three of the variables with the other two) to reduce the number of variables? I'm still very new to Boolean algebra, and I am not very familiar with them - so please correct me if I have made any mistake.