Variables

 

Basic algebra, which is found on the SAT math section, deals with variables. Basically, these are unknowns in the equation. By following basic algebra rules, it is possible to do quite well on the math portion of the SAT. However, as with other sections on the test, the people who come up with the questions make sure they have good, tricky questions. The questions that are typically asked on the SAT math section are actually really simple and deal with basic math concepts. Sometimes, however, test takers make the questions more confusing then they need to be. This is especially true when it comes to algebra and variables.  In order to solve an algebra equation, it is necessary to isolate the variable on one side of the equation with the known numbers on the other side. Anything done to one side of the equation must be also done to the other. To start, it is necessary to simplify each side of the equation as far as possible. To get rid of a negative, add that number to both sides of the equation. To get rid of a positive number, subtract it from both sides. If a number is being multiplied, it should be divided to get rid of it on one side. Likewise, if it is being divided on the side with the variable, it should be multiplied on both sides. Eventually, the variable will be left on one side with a number on the other side - the answer.  TIP: Do not reduce answers on the test. Instead, change them into decimals or mixed numbers. Frequently, answers given on the SAT will be improper fractions or integers underneath a square root instead of showing the decimal equivalent. Because of this, it is a good idea to not do any math operations unless it is necessary. For example, if the answers are decimal equivalents, there is no need to figure the answer as a fraction, which can save time on the overall test. This can lead to more correct answers and a higher overall SAT math score, which is the goal.  BONUS TIP: Your variable should always be positive. If it is not, multiply both sides by -1 to get a positive number. It is important to do this with all numbers on both sides of the equation. Beyond this, it is important to brush up on basic algebra skills and do some practice problems on  your own. By doing this, you can allow your mind time to remember everything you were taught over the years in school about math and arithmetic.