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anonymous

  • one year ago

How dose one solve two step equations.

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  1. ♪Chibiterasu
    • one year ago
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    You have to isolate the variable

  2. ♪Chibiterasu
    • one year ago
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    i.e. 5x - 4 = 21 (i made this up) So we need to leave x alone

  3. ♪Chibiterasu
    • one year ago
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    To do this, we need to cancel out everything on one side and move it to the other side to find the value of x

  4. ♪Chibiterasu
    • one year ago
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    5x - 4 = 21 Let's get rid of -4 first. The opposite of -4 is +4 so we must add 4 on both sides of the equation. 5x - 4 + 4 = 21 + 4 5x = 25

  5. anonymous
    • one year ago
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    So for example If i had 11-3f+8=r how would i approach the problem.

  6. ♪Chibiterasu
    • one year ago
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    Now we cancel out the 5 The opposite of multiplying 5 is DIVIDING it. 5x/5 = 25/5 x = 5

  7. ♪Chibiterasu
    • one year ago
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    Ok well that one is three steps actually

  8. anonymous
    • one year ago
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    not r but but 4

  9. ♪Chibiterasu
    • one year ago
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    First look at 11 and 8. These are like terms so just combine them. 11 + 8 = 19

  10. ♪Chibiterasu
    • one year ago
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    Now we have 19 - 3f = 4

  11. ♪Chibiterasu
    • one year ago
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    WE get rid of anything without a variable first, so what is the opposite of adding 19?

  12. ♪Chibiterasu
    • one year ago
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    I say adding because even tho it is at the beginning of the equation, it is positive.

  13. anonymous
    • one year ago
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    How would i solve for x thought?i believe it is subtracting 19 from 3 right?

  14. ♪Chibiterasu
    • one year ago
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    We can't do that because 3 is attached to a variable. you cant to 19 - 3f because we dont know what f is. if 19 had the same variable we could i.e. 8f - 3f = 5f but we cant, so we need to bring 19 to the other side of the equation

  15. ♪Chibiterasu
    • one year ago
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    WE have to cancel it out. So the *opposite* of +19 is what?

  16. anonymous
    • one year ago
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    -19

  17. ♪Chibiterasu
    • one year ago
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    Yep. So we subtract 19 on BOTH sides of the equation. We do it on both sides to make it equal. 19 - 19 - 3f = 4 - 19 what do we have now after subtracting?

  18. anonymous
    • one year ago
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    Add our left over variables.

  19. ♪Chibiterasu
    • one year ago
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    What do we get when subtracting 19 on both sides?

  20. anonymous
    • one year ago
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    0

  21. ♪Chibiterasu
    • one year ago
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    Noooo we have: -3f = -15 19 - 19 just cancels out and we had to subtract 4 - 19

  22. ♪Chibiterasu
    • one year ago
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    WE make 3 negative because that was the sign that was in front of it

  23. anonymous
    • one year ago
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    no wrong thing.

  24. ♪Chibiterasu
    • one year ago
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    Now what do you think we do to remove -3 from the f?

  25. ♪Chibiterasu
    • one year ago
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    what

  26. anonymous
    • one year ago
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    so -3 * f = 4-19

  27. ♪Chibiterasu
    • one year ago
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    Yes, but 4 - 19 can just be simplified to -15 -3 * f = -15

  28. anonymous
    • one year ago
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    I get it now thanks!!!

  29. ♪Chibiterasu
    • one year ago
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    Yeah, just remember to divide -3 on both sides to cancel out and isolate x.

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