Algebra is the part of mathematics in which letters and other general symbols are used to represent numbers and quantities in formulae and equations.

Algebra is the part of mathematics in which letters and other general symbols are used to represent numbers and quantities in formulae and equations.

For example:

x + 3 = 7

where x is unknown… often called the “variable”.

In this case the value of x can be found by subtracting 3 from both sides of the equal sign:

x + 3 = 7
x + 3 - 3 = 7 - 3
x + 0 = 4

Answer: x = 4
history | excerpt history