Enter the correct answer to the equation and press the Enter key on your keyboard.

You may choose a difficulty level using the slider.

(**Note:** Your answer has to be correct before you can have a new problem.)

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**Solve Equation Using a Balance.**

- Solve the equation on the balance and then check the box to verify your answer.
- Click to continue.

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**Solve Linear Equations.**

- Enter the constant term and its sign that appears on one side of the equation in the second box.
- Press the Enter key on your keyboard.
- On a sheet of paper, solve the equation and enter your answer in the first box.
- Press the Enter key on your keyboard.
**If any value(s) you enter are correct, the applet will automatically indicate this to you.***Practice this skill as much as you need in order to master this concept!*- There are 4 difficulty levels here (see slider at bottom.)

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**Analyze the Graph of a Straight Line.**

Here is the graph of a linear equation.

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**Solve each equation, and check your solution.**

(1).

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(2).

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(3).

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Clare was solving an equation, but when she checked her answer she saw her solution was incorrect. She knows she made a mistake, but she can’t find it.

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A participant in a 21-mile walkathon walks at a steady rate of 3 miles per hour. He thinks, “The relationship between the number of miles left to walk and the number of hours already walked can be represented by a line with slope = -3. ” Do you agree with his claim? Explain your reasoning.

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