Balancing Equations with Missing Variable

If you add -6 to one side, what do you do to the other side?

• Subtract -6

• Subtract  6

• Add -6

• Subtract -6

If you subtract 3 from one side, you have to subtract 3 from the other side.

• True

• False

To solve 10x = 45, what do you do to both sides?

• Subtract 10 from both sides

• Divide 10 from both sides

• Subtract 45 from both sides

• Divide 45 from both sides

Select all equations that match this tape diagram.

Select all equations that match this tape diagram.

Select all equations that match this balanced hanger.

Select all equations that match this balanced hanger.

Select all equations that match this balanced hanger.

What is the variable in this expression? 3x=21

• 3

• x

• 21

Select all equations that are represented in this diagram.

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