Algebraic equations

Your maths exam will definitely have something which involves algebra. You will need to understand how to use and manipulate algebraic expressions to answer these questions.
There are many rules in using algebra:
An algebraic expression involves letters which represent values. There is an equals sign which shows you what the subject of the expression is equal to.
To rearrange or solve an expression you may need to cancel things out. This may involve a calculation to one side of the expression. However, what you do to one side of the expression you must do the same to the other side.
Before doing anything you should simplify an expression so that there are no fractions and no brackets.
Multiplying out brackets is important. When multiplying out two brackets you must remember that everything has to be multiplied together:
(a+b)(x+y)=ax+ay+bx+by