# How do you solve #W/9 = 9 #?

##### 2 Answers

#### Explanation:

Multiply both sides by

#### Explanation:

For add or subtract move to the other side of the equals and do the opposite: change its sign.

For divide or multiply move it to the other side of the equals and do the opposite: if originally divide then you multiply when on the other side. If originally multiply then you divide when on the other side.

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The key to manipulation of equations and moving something to the other side of the equals sign:

Let me demonstrate:

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Suppose we had

To end up with

Subtract

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Suppose we had

Divide both sides by

But divide by 2 is the same as multiply by

But

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Multiply both sides by 9 giving: