Math (Grade 9)

Solving Linear Equations:

x
_ - 3 = 5

7

I know you have to add three to each side, but after that im not sure what to do,, please help!

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  1. x/7 = 8

    Multiply both sides by 7.

    x = 56

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    Ms. Sue
  2. I don't understand how x/7 is 8 because how do you know what x is ???

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  3. (x/7) - 3 = 5

    Add 3 to both sides.

    x/7 = 8

    Multiply both sides by 7.

    (x/7) * 7 = 8 * 7
    x = 56

    Proof:

    (56/7) - 3 = 5
    8 - 3 = 5

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    Ms. Sue

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