

Reliable problem Solving applied to mixture problems
Observe the simplicity of the two variable mixture problem. It is simpler than the Mary's Apples problem. It involves only one indented step (subproblem) and a result step. Mary's Apples involves two indented steps (subproblems) and a result step.
To solve problems reliably use the following steps recursively.
STEP 1: Identify what the problem/equation asks for.
STEP 2: Respond to the request. Ask "How Would I Find Out?"
STEP 3: Substitute the response(s) to obtain the result.