See also the Dr. Math FAQ: order of operations 3D and higher
Browse Middle School Algebra Stars indicate particularly
interesting answers or good places to begin browsing. Selected
answers to common questions: Direct and indirect variation.
Inequalities and negative numbers. Positive/negative integer
rules. Solving simple linear equations. - Solving Linear
Equations [03/18/1997] What are the steps to solve linear
equations? - Solving Linear Equations without PEMDAS
[08/13/2002] Is there a linear equation that can be solved using
both the PEMDAS order of operations and NOT using the order of
operations and still come out with the same answer? - Solving
Linear Inqualities [06/10/1999] How can I solve 9 <= 2x-1 <= 15
for x? - Solving Literal Equations [09/08/2001] I can do
equations fine with just numbers, but doing them literally with
letters is confusing me. - Solving Pairs of Equations by
Substitution [11/26/1997] x + 3y = - 5; 3x - 2y = 7. - Solving
Quadratic Equations [03/07/1997] A rectangle has an area of