Beyond basic knowledge, using effective problem-solving strategies is essential for turning algebra skills into high scores. A very useful method, often used by top performers, is the ability to change word problems into clear mathematical expressions. This skill is crucial, especially for the more logical problems found in certain types of management aptitude tests. The process includes breaking down the problem statement, identifying what is known and what is unknown, and then carefully converting the text into algebraic equations or inequalities. This translation skill not only helps in solving the problem but also clarifies the underlying math structure, making complex situations easier to handle.  
To manage variables efficiently within these expressions, two strong techniques stand out: substitution and elimination. The substitution method involves solving one equation for a variable and then plugging that expression into another equation to reduce the number of variables, simplifying the system. This technique works well when one equation can be easily rearranged to show a variable in terms of others. On the other hand, the elimination method involves adjusting equations (often by multiplying them by constants) so that when added or subtracted, one or more variables cancel out, resulting in a simpler equation with fewer unknowns. Both methods, when used wisely, can greatly improve the process of solving systems of equations, leading to faster and more accurate answers. The choice between substitution and elimination often depends on the specific layout of the equations, with experienced test-takers identifying the most effective approach.