What is the variable in these questions?

Question

1. 75+7x=2x

2.3n-1=5a-9

3.4-6p=2p-3

4.60c-54(c-2)=0

Answer 1

The variable is the letter.

PROBLEM 1:

x

PROBLEM 2:

n and a (for there to be a solution, you would need only one variable, so perhaps you have a typo?)

PROBLEM 3:

p

PROBLEM 4:

c

Answer 2

Are you doing this for homework?

Anyways,

1. x

2. n and a

3. p

4. c

Variables are like numbers, an undefined unknown. Often you have to solve a problem to find out the variable by means of graphing, substition, etc.

Yay. The long boring lecture is over

LAUGH! ;)