1.
A letter that stands for an unknown number.
2.
A mathematical statement.
3.
A number before the variable.
4.
to make something less complex.
5.
A number that represents a part of a whole consisting of a numerator and a denominator.
7.
Terms with the same variable and the same exponent.
8.
To rearrange an equation.
10.
Number without a variable.
11.
Opposite operation used.
13.
Finding the difference
