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Either move the negative over to the other side to become positive, or divide the entire equation by -1 to get it to a positive.

Example:

-3x + 12 = 30

Move the -3x over to get

12 = 30 + 3x

12 - 30 = 3x

- 18 = 3x

- 6 = x

OR

Divide by -1 to get

3x - 12 = - 30

3x = - 30 + 12

3x = -18

x = -6

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Q: What if linear equations starts with a negative?
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