Variable – A symbol, usually a letter of the alphabet, such as the letter n, that is used to represent a number. An expression, such as n – 5, that consists of one or more numbers and variables along with one or more arithmetic operations are Variable expression. An algebraic expression can consist of one or more numbers and variables along with one or more arithmetic operations.

write the expression, substitute a number for each variable, and simplify the result.

For example: Evaluate expression n+3 when n = 4

Solution: given n = 4

Substituting n=4 in expression n+3

n+3 =4+3

=7

When we replace letters in an expression or equation with number, this process is called Substitution.

For example: How can 4+3* be written as an algebraic expression?

Using n for the variable we can write this as 4+3n

We can evaluate the expression 4+3n by substituting different values for n

When n=5 4+3n= 4+3*5

= 4+15

=19

When n= 11 4+3n = 4+3*11

=4+33

=37

Method | Type of System |

Substitution | Linear or nonlinear, two variables |

Graphical method | Linear or nonlinear, two variables |

Elimination | Linear, two variables |

Gaussian elimination | Linear, three or more variables |

Assignment Writing Help

- Science Assignment Help
- Math Assignment Help
- Chemistry Assignment Help
- Physics Assignment Help
- Biology Assignment Help
- Psychology Assignment Help
- History Assignment Help
- Geography Assignment Help
- English Assignment Help
- Humanities Assignment Help
- Nursing Assignment Help
- Social Science Assignment Help
- Arts and Architecture Help
- Statistics Assignment Help
- Law Assignment Help
- Computational Mathematics Assignment Help

Engineering Assignment Services

- Programming Assignment Help
- Database Help
- Data Structure Assignment Help
- Operating Systems Assignment Help
- Computer Network Assignment Help
- UML Diagram Assignment Help
- IT Assignment Help
- Game Programming Help
- Computer Science Assignment Help
- Information Systems Assignment Help
- Chemical Engineering Assignment Help
- Civil Engineering Assignment Help
- Electrical, Electronics Help
- Mechanical Engineering Assignment Help
- Petroleum Engineering Assignment Help
- Biochemical and Biotechnology Help

Do My Assignment Help

- Accounting Assignment Help
- Finance Assignment Help
- Economics Assignment Help
- Marketing Assignment Help
- Human Resources Assignment Help
- Operations Management Assignment Help
- Strategy and Planning Help
- Project Management Help
- Case Studies Writing Help
- Political science
- Referencing Help
- Assignment Help Websites
- Online Assignment Help
- Do My Assignment
- Do My Homework
- Health Informatics

Write My Essay Services

- Essay Writing Help
- Business Essay Writing Help
- Assignment Writing Services
- Plagiarism Free Essay Writing
- Essay Editing Service
- Dissertation Writing Services
- Thesis Writing Help
- Custom Writing Help
- Write My Essay
- Write My Paper
- Paper Writing Service
- Academic Writing Help
- College Essay Writing
- Cheap Essay Writing