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# Checking Solutions to Equations

Levels are CK-12's student achievement levels.
Basic Students matched to this level have a partial mastery of prerequisite knowledge and skills fundamental for proficient work.
At Grade (Proficient) Students matched to this level have demonstrated competency over challenging subject matter, including subject matter knowledge, application of such knowledge to real-world situations, and analytical skills appropriate to subject matter.
Advanced Students matched to this level are ready for material that requires superior performance and mastery.

## Checking Solutions to Equations

Verify that solutions to algebraic equations are correct.

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## Evaluating Algebraic Expressions and Equations

This lesson covers solving expressions or equations for a given value.

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• PLIX

## Taxi Cab Calculations; Checking Solutions to Equations

A cab company charges a $1 boarding fee then$2 for each mile traveled.

The cost of a cab ride can be modeled by cost = $2 $\cdot$ (miles traveled) +$1, or  y=2x+1

Move the red dot along the line. A line is the set all points that satisfies condition, if the dot is on the line, it satisfies the conditions.

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• Video

## Variables Expressions and Equations

Introduces the idea of variable in expressions and equations.

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• Video

## Check Solutions to Equations: A Sample Application

This video demonstrates a sample use of the principles of checking solutions to equations.

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• Video

## Check Solutions to Equations: An Explanation of the Concept

This video provides an explanation of the concept of checking solutions to equations.

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• Practice

## Checking Solutions to Equations Practice

Practice Checking Solutions to Equations questions

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Come up with questions about a topic and learn new vocabulary to determine answers using the table

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