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Prealgebra

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How do you do these probelms?
1. 7p+11=-31
2. 12-7y=-2
3. 2z-4-z=4
4. 10-5h+2=32
5. 7k-8k=1
6. 10-d=19
7. 9x+5-4x=-20
8. 3-4t+11=2
9. 5b+6-6b+2=19

  • Prealgebra -

    1. Subtract 11 from both sides, to get rid of the 11. Then solve for p.
    7p+11=-31
    -11 -11
    7p=-42
    Then divide by 7 to get rid of the 7.
    p=-6
    Does that help?

  • Prealgebra -

    Ms. Sue's response is more clear than mine. My computer didn't put some numbers in the right spot.

  • Prealgebra -

    7p+11=-31

    7p = -31 - 11
    7p = -42
    p = -6

    Follow this pattern for solving the rest of the problems.

    If you post your answers, we'll be glad to check them for you.

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