# Find out which operation must be done on both sides of these equations in order to solve them: 1. x + 9 = 11  2. x – 4 = 9

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Find out which operation must be done on both sides of these equations in order to solve them:

1. x + 9 = 11

2. x – 4 = 9

3. 8x = 24

4. $\cfrac{x}{6}$ = 3

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1. Subtract 9 from both sides.

2. Add 4 to both sides.

3. Divide both sides by 8.

4. Multiply both sides by 6.