3x-y=6
-y= 6-3x or is it 3x-6?
?// now what?
College Algebra refresher
Author
This is my first math class in a LONG time, I am taking college algebra, whatever that means. I am a bit rusty with the process. How do you get rid of the negative sign on a variable?
Solve for y so points can be plotted using a T table
It is probably real simple but it escapes me at the moment.
Any help appreciated!!
Author
Quote:Original post by smurfkiller
1: 3x - y = 6
2: 3x = 6 + y
3: 3x - 6 = y
ans: y = 3x - 6
I had this in mind but wasn't sure if you could switch the sides of the equation. Like i siad its been awhile..........
Quote:Original post by bluefox25
Sou would it be
y= 3x-6 or y= 6-3x
It makes a difference right?
-y * -1 = (6-3x) * -1 y = (6 * -1) - (3x * -1) y = (-6) - (-3x) y = -6 + 3x y = 3x-6Introduction to algebra, simplifying equations.
Author
Would this be right?
x-4y=5
x=5+4y
x-5=4y
x-5
___ = y
4
So if x = -3,-2,-1,0,1,2,3
(-3,-2)
(-2,-7/4)
(-1,2/3)
Come to think of it, this isn't right is it? Canyou have a fraction as coordinate?
Maybe it should be
y= 1/4x+(-5)
?
x-4y=5
x=5+4y
x-5=4y
x-5
___ = y
4
So if x = -3,-2,-1,0,1,2,3
(-3,-2)
(-2,-7/4)
(-1,2/3)
Come to think of it, this isn't right is it? Canyou have a fraction as coordinate?
Maybe it should be
y= 1/4x+(-5)
?
Quote:Original post by bluefox25
So if x = -3,-2,-1,0,1,2,3
(-3,-2)
(-2,-7/4)
(-1,2/3)
Come to think of it, this isn't right is it?
You were doing it just right.
(-3,-8/4)
(-2,-7/4)
(-1,-6/4) //not 2/3
( 0,-5/4)
( 1,-4/4)
( 2,-3/4)
...
Author
Thanks!1
So I am not totally out of my mind yet!1
Wish I hadnt taken this class oer summer
4hrs a day for class * 4 days a week = TOO MUCH MATH!!!
So there is nno need to reduce the fractions? Any particular reason?
So I am not totally out of my mind yet!1
Wish I hadnt taken this class oer summer
4hrs a day for class * 4 days a week = TOO MUCH MATH!!!
So there is nno need to reduce the fractions? Any particular reason?
Author
Let see if I can get this one
4x-3y=12
4x=12+3y
4x-12=3y
4x-12
_____ = y
3
y= 4x-4
Am I right?
4x-3y=12
4x=12+3y
4x-12=3y
4x-12
_____ = y
3
y= 4x-4
Am I right?
This topic is closed to new replies.
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