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How do linear relation equations work?

My girlfriend is working on her maths and she's come up to linear elationships, how are we supposed to work them out.

Examples

5x + 8 = 2

-15=3-6x

I need to know how to do it, not the answers.

1 Answer

Relevance
  • 2 months ago

    5x + 8 = 2

    Subtract 8 from both sides:

    5x = -6

    Divide by sides by 5:

    x = -6/5 = -1.2

    -15 = 3 - 6x

    Subtract 3 from both sides:

    -18 = -6x

    Divide both sides by -6 and switch sides:

    x = 3

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