Pls help me I don't understand ​

0

Step-by-step explanation:

the answer is 0

Explanation:

Think of z as having 1 zebra

2z means we have 2 zebras

If we started with 2z, and subtracted off 2z, then we're left with 0 zebras. We write this as 0z or just 0 since 0 times anything is 0.

As another example:

Let's say we wanted to simplify 5z - 2z

Well that's the same as saying "5 zebras take away 2 zebras". We'd be left with 3 zebras because 5-2 = 3

Since 5-2 = 3, this leads to 5z-2z = 3z. The difference is that I tacked 'z's onto each number.

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step-by-step explanation:

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