We start by naming the unknowns with variables. If we add all the numbers together, we get We have one equation. We have two equations. We just need one more! We have three equations, so we have our system. A system of equations is a group of two or more equations with the same variables. A solution of a system of equations consists of the values of the variables that make all of the equations in the system true. This is also the intersection point of the equations when we graph them all on the same graph.

Systems of equations can be used in applications that have more than one unknown and enough information to set up equations in those unknowns. If there are n unknowns, we need enough information to set up n equations. Recognizing when to use systems of equations and being familiar with how to set them up makes solving applications with more than one unknown much easier. To unlock this lesson you must be a Study.

## Inequalities

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## Linear equations and inequalities | Algebra basics | Math | Khan Academy

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### Kid Smart Education

Add to Add to Add to. Want to watch this again later? Systems of equations are extremely useful in applications where there is more than one unknown. We will explore applications that involve systems of equations and look at how to set up a system of equations with given information. System of Equations A system of equations is a group of two or more equations containing the same variables. Graph of a System of Equations Notice that the intersection point of the equations on the graph is a point that satisfies both of the equations in the system.

Example We see that the intersection point is 14, Example Let's consider one more example. If you add all the numbers together you get Two times the first number plus the second number is equal to the third number plus Doubling the sum of the first and second number gives 3 times the third number. Try it risk-free No obligation, cancel anytime.

### Applications of Systems of Equations

Want to learn more? Select a subject to preview related courses: Lesson Summary A system of equations is a group of two or more equations with the same variables.

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Browse Articles By Category Browse an area of study or degree level. Area of Study. Degree Level. You are viewing lesson Lesson 10 in chapter 8 of the course:. Homework Help Resource 26 chapters lessons 2 flashcard sets. Algebra II - Basic Arithmetic Homework Help for Algebraic Algebra II - Real Numbers: Algebra II - Complex and Imaginary Algebra II Homework Help: Algebra II - Properties of Algebra II - Linear Equations Algebra II - Inequalities Review Ch Algebra II - Matrices and Algebra II - Absolute Value Algebra II - Polynomials: Algebra II - Factoring: Algebra II Homework Help Algebra II - Rational Expressions Algebra II - Graphing and Algebra II - Roots and Radical Algebra II - Quadratic Equations Algebra II - Exponential and Our Equations and Inequalities Worksheets are free to download, easy to use, and very flexible.

These Equations and Inequalities Worksheets are a good resource for students in the 8th Grade through the 12th Grade. These worksheets will produce ten problems per worksheet. Absolute Value Equations Worksheets These Equations and Inequalities Worksheets will produce absolute value problems with monomials and polynomials expressions. Distance, Rate, and Time Word Problems These Equations and Inequalities Worksheets will produce distance, rate, and time word problems with ten problems per worksheet.

You may select the numbers to be represented with digits or in words. Mixture Word Problems These Equations and Inequalities Worksheets will produce mixtures word problems with ten problems per worksheet. Work Word Problems These Equations and Inequalities Worksheets will produce work word problems with ten problems per worksheet. Multiple Step Inequalities Worksheets These Equations and Inequalities Worksheets will produce multiple step inequalities problems for graphing.

You may select which type of inequality to use in the problems. Compound Inequalities Worksheets These Equations and Inequalities Worksheets will produce compound inequalities problems for graphing.

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Absolute Value Inequalities Worksheets These Equations and Inequalities Worksheets will produce absolute value inequalities problems for graphing. Worksheets By Topics.