How do I solve for the missing angle in the triangle?
If you are given two angles in the triangle, you know the sum of the angles must be 180 degrees and therefore, you can add up the information you have to solve for the missing angle.
What is the best way to memorize times tables?
Use flashcards, make problem sets, recite the times tables back to me.
How do I solve a system of equations?
You can either use substitution or elimination. Given two equations, you can isolate one variable and replace it in the equation or you can add up the two equations to use substitution.