UNDOING OPERATIONS

SO, HOW DO WE UNDO OPERATIONS?

First we need to understand what all of the operations that we will be undoing are.

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So, the operations are:

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1. Addition
2. Subtraction
3. Multiplication
4. Division

So, how do we undo Addition?

By subtracting. Whenever you see a + sign and you want to undo it, you subtract whatever is being added.

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An example of this:

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0 = x + 23

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If we want to know what x is, we undo the addition.

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So we subtract 23 from the equation.

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-23 -23

And we get that x = -23

Some Examples For undoing addition

1. x + 12 = 36

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• 12 + x = 7

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• 5 + x = 12

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4. x + 100 = 101

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-12 -12

x = 24

-12 -12

x = -5

-5 -5

x = 7

-100 -100

x = 1