Which equation doesn't belong? Explain your reasoning.

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Solve each equation.

x + 6 = 4

x = _____

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x - -4 = -6

x = _____

2(x - 1) = -200

x = _____

2x + -3 = -23

x = _____

Here are some equations that all have the same solution.

x = -6

x - 3 = -9

-9 = x - 3

900 = -100(x - 3)

900 = (x - 3) * (-100)

900 = -100x + 300

Explain how you know that each equation has the same solution as the previous equation. Pause for discussion before moving to the next question.

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Keep your work secret from your partner. Start with the equation -5 = x. Do the same thing to each side at least three times to create an equation that has the same solution as the starting equation. Write the equation you ended up with on a slip of paper, and trade equations with your partner.

Enter your equations here.

See if you can figure out what steps your partner used to transform -5 = x into their equation. When you think you know, check with them to see if you are right.

Write their equations here and the steps they used.