llroberts43
  • llroberts43
I am stumped on the slope intercept form. 3x-4y = 12. I don't understand why the answer is 3/4x - 3. How does it become x?
Mathematics
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SOLVED
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katieb
  • katieb
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Nnesha
  • Nnesha
you should keep the x slope intercept form is y=mx+b where m is slope and b is y-intercept
Nnesha
  • Nnesha
you need to solve for y\[\huge\rm 3x-4y=12\] move the `3x`to the right side and then -4
Nnesha
  • Nnesha
ho would you cancel out the 3x from the left side ?

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llroberts43
  • llroberts43
3x - 4y = 12 3x - 3x -4y = -3x +12 -4y and then I don't know what do next.
Nnesha
  • Nnesha
great! :=)
Nnesha
  • Nnesha
now how would you cancel out the -4 from the left side ?
llroberts43
  • llroberts43
4y/4?
Nnesha
  • Nnesha
nice but don't forget it's negative so -4 :=)
llroberts43
  • llroberts43
Yes I saw that but I had already hit post. So I've cancelled out 4 but I still don't understand how the answer becomes 3/4x -3. Where did the 12 go?
Nnesha
  • Nnesha
\[\huge\rm y=\frac{ 3 x}{ 4 }+\frac{ 12 }{ -4 }\] 12/-4 = ? you can divide it right!
llroberts43
  • llroberts43
Oh....that would equal -3. Right in front of me, thank you!!
Nnesha
  • Nnesha
:=) my pleasure great job!

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