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anonymous

  • 5 years ago

16x – 3(4x + 7) = 6x –(2x + 21)what does x=?

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  1. bahrom7893
    • 5 years ago
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    multiply out the parenthesis: 16x - 12x - 21 = 6x - 2x - 21 Add 21 to both sides: 16x - 12x = 6x - 2x Move all x's to one side: 16x - 12x - 2x - 6x = 0 x = 0.. are u sure the question is right?

  2. anonymous
    • 5 years ago
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    yes but it just doesnt make sense right!!!!!

  3. bahrom7893
    • 5 years ago
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    yeah.. but that is the right answer, x = 0

  4. bahrom7893
    • 5 years ago
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    Please click on become a fan if I helped, I really want to get to the next level!! Thanks =)

  5. anonymous
    • 5 years ago
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    x=1

  6. anonymous
    • 5 years ago
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    how

  7. anonymous
    • 5 years ago
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    I'm wrong but it end up being 1=1

  8. anonymous
    • 5 years ago
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    no oi just tried it and your right

  9. anonymous
    • 5 years ago
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    4x=4x so that means 4/4 =x/x which means 1=1

  10. anonymous
    • 5 years ago
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    or x=x

  11. anonymous
    • 5 years ago
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    Solve the system of equations using elimination. x-3y=-4 and 2x+6y=5

  12. anonymous
    • 5 years ago
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    Which means you can plug in any value for x and the equation holds true

  13. anonymous
    • 5 years ago
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    and how did u get it

  14. anonymous
    • 5 years ago
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    how did i get what?...

  15. bahrom7893
    • 5 years ago
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    for the first equation there are infinite number of solutions.. it's not just 0 or 1

  16. bahrom7893
    • 5 years ago
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    x-3y=-4 2x+6y=5 x = -4 + 3y 2(-4+3y)+6y = 5

  17. anonymous
    • 5 years ago
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    yeah thats why i said you can plug in any value for x and the equation holds true

  18. bahrom7893
    • 5 years ago
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    sorry didnt see that..

  19. anonymous
    • 5 years ago
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    its all good

  20. bahrom7893
    • 5 years ago
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    x = -4 + 3y 2(-4+3y)+6y = 5 x = -4 + 3y -8 + 6y + 6y = 5

  21. bahrom7893
    • 5 years ago
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    x = -4 + 3y 12y = 13 x = -4+3y y = 13/12

  22. bahrom7893
    • 5 years ago
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    x = -4+3y y = 13/12 x = -4 + 13/4 = -16/4 + 13/4 = -3/4 y = 13/12

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