Anumber;
1. a term containing no variables variable.
2. one term or multiple terms connected by an addition or subtraction sign expression.
3. an equation that uses variables to state a rule term.
4. a number or a variable, or the product of a number and variable(s) constant.
5. a letter or symbol used to represent an unknown number.

First option is correct.

Step-by-step explanation:

A number in an expression is a term that contains no variables.

So, it is known as constant term.

if any term is with variable or variables, then it can't be consider as a number.

Then, it becomes only a term.

But if there is no variables in a term is present, then it is called to be number.

Hence, First option is correct.

x = -4

step-by-step explanation:

- 20 - 4(x + 3) = 4x

=> -20 - 4x - 12 = 4x

=> - 32 -4x = 4x

=> -32 = 4x + 4x

=> - 32 = 8x

=> -32/8 = x

=> -4 = x

answer: 7

step-by-step explanation: