# How do you solve rational equations #x/2 = 4/7#?

##### 2 Answers

#### Answer:

This is why cross multiply works

#### Explanation:

You are very likely to have been shown this in school:

This is the cross multiply shortcut approach and I would recommend you use it as it is quite fast.

To 'get rid' of something that is multiply or divide turn it into 1

To 'get rid' of something that is add or subtract turn it into 0.

In doing this it turns up on the other side of the equals sign.

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Given:

We need to 'get rid' of the

Multiply both sides by

But