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Tateana95

  • 2 years ago

How to solve 2y+4x+8;x=-2,1,3 PLease tell me step by step!!!

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  1. chihiroasleaf
    • 2 years ago
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    are you sure that it's the question? it's not an equation...

  2. Tateana95
    • 2 years ago
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    Like if you take off the ;x=-2,1,3 it has the 2y+4x+8;x

  3. Tateana95
    • 2 years ago
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    that is how they have it in the book so i dont know.

  4. hartnn
    • 2 years ago
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    2y+4x+8 is an expression. you cannot solve an expression ,only find its value at a particular 'x' and 'y'. did you mean 2y = 4x+8 ?? and need to find the value of y for x= -2,1,3 ?? if possible , you can post the screenshot of the entire question, so we can help :)

  5. Tateana95
    • 2 years ago
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    Ok ill try

  6. Tateana95
    • 2 years ago
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    Just to let yall know that equation falls under Rewriting a literal Equation it wont let me put pic sorri

  7. Tateana95
    • 2 years ago
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    The way it is in the book is like this 2y+4x=8;x=-2,1,3

  8. hartnn
    • 2 years ago
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    ok,so now i think you need to find 'y' values. can you isolate 'y' from 2y+4x= 8 ? that is bring it in the form y=....

  9. Tateana95
    • 2 years ago
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    Nope im still confused

  10. hartnn
    • 2 years ago
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    2y+4x=8 divide entire equation by 2, what u get ?

  11. Tateana95
    • 2 years ago
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    one sec let me see

  12. Tateana95
    • 2 years ago
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    i got 4

  13. Tateana95
    • 2 years ago
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    So isnt it going to be 4x=8-2y?

  14. hartnn
    • 2 years ago
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    let me give u an example, if you had 6y+2x=10 and if you wanted to divide entire equation by 2, you would get , (6/2)y + (2/2)x =10/2 which is 3y+x=5 , an equation. so what do u get for 2y+4x=8 ?

  15. Tateana95
    • 2 years ago
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    So isnt it going to be 4x=8-2y? then 4x/4=(8-2y)/4 then answer is x=(8-2y)/4

  16. hartnn
    • 2 years ago
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    but here, you need to isolate y, you actually isolated 'x'. can you try to isolate 'y' similarly ?

  17. Tateana95
    • 2 years ago
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    Nope i just know how to do the 'x'

  18. hartnn
    • 2 years ago
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    thats why i asked you to divide both sides by 2 first and gave you an example, see that and tell me what u get after dividing 2 on both sides of 2y+4x = 8

  19. hartnn
    • 2 years ago
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    alternatively, you can subtract 4x from both sides first...

  20. Koikkara
    • 2 years ago
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    2y + 4(-2) = 8 2y + (-8) = 8 2y = 8+8 y = 16/2 y = 8 ---------------------------- 2y + 4(1) = 8 2y + 4 = 8 2y = 8-4 y = 4/2 y = 2 ------------------------------ 2y + 4(3) = 8 2y + 12 = 8 2y = 12-8 y = (-4)\2 y = -2

  21. Koikkara
    • 2 years ago
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    sorry to say...just substitute it....for x....

  22. Tateana95
    • 2 years ago
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    Ok thank you

  23. Koikkara
    • 2 years ago
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    wlcm..

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