In algebra you use letters for unknown numbers.

You can simplify expressions that contain + and - by collecting terms. example: h+h+h=3h

A more harder expession to simplify would be: 2p+3q-5p = 2p-5p+3q+q = -3p + 4q. - this is in its simpliest form.

You could get some exam questions like:

6n + n - 4n. This would simplify to 3n.

Another exam question could be finishing the sentence like this:

Root formula factor term

Choose a word from the list above to make this sentence correct.

8x is a in 3y + 8x + 5. The corret answer would be term.

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