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countrygirl1431

  • one year ago

Solve the following equation. 3x + 1 + 5x = 7 +15 + 7x

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  1. mathstudent55
    • one year ago
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    First, combine like terms on both sides of the equal sign. Like terms are terms that have the same variable. On the left side, combine 3x and 5x. On the right side, combine 7 and 15.

  2. mathstudent55
    • one year ago
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    What do you get?

  3. mathstudent55
    • one year ago
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    \( \color{red}{3x} + 1 + \color{red}{5x} = \color{green}{7 +15} + 7x\) \(\color{red}{3x + 5x} + 1 = \color{green}{7 +15} + 7x\) What is 3x + 5x = ? What is 7 + 15 = ?

  4. triciaal
    • one year ago
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    @countrygirl1431 waiting for your input

  5. countrygirl1431
    • one year ago
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    7x and 22

  6. mathstudent55
    • one year ago
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    3 + 5 = 8, right? So 3x + 5x = 8x.

  7. mathstudent55
    • one year ago
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    \(\color{red}{8x } + 1 = \color{green}{22} + 7x\) So far we combined the like terms on the left and we combined the like terms on the right. Ok so far?

  8. countrygirl1431
    • one year ago
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    oops sorry i put thr wrong number sorry

  9. mathstudent55
    • one year ago
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    Now we want all terms with x on the left side, and all plain numbers on the right side. Since there the term 7x on the right side, we subtract 7x from both sides. |dw:1441819900908:dw|

  10. mathstudent55
    • one year ago
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    On the left side, what is 8x - 7x = ?

  11. mathstudent55
    • one year ago
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    |dw:1441820054018:dw|

  12. countrygirl1431
    • one year ago
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    its x=21

  13. mathstudent55
    • one year ago
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    Correct. Now we want all plain numbers on the right side, so we subtract 1 from both sides. |dw:1441820102435:dw|

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