#1
3x + y = -1
becomes
y = -1 - 3x
#2
2x - y = -4
becomes
y = -4 - 2x
Is that right?
2007-11-16 06:18:57 · 9 answers · asked by Madera 2 in Science & Mathematics ➔ Mathematics
The first one is correct, though it's more usual to write it as
y = -3x - 1.
The second one is tricky because of the negative in front of the y. It should be: y = 2x + 4, and would be if you multiplied through by -1 to change -y to y.
2007-11-16 06:23:55 · answer #1 · answered by Marley K 7 · 0⤊ 0⤋
The first one is correct, on the second one, you have to give a little more attention
when you subtract the 2x from both sides, you're left with:
-y=-4-2x
Be aware of things like the negative y.
To change this, just change the signs of both sides, and you get
y=4+2x
2007-11-16 06:24:53 · answer #2 · answered by Anonymous · 1⤊ 1⤋
The first one is correct.
For the second one:
2x - y = -4
-y = -4 -2x
Now you would divide the whole equation by negative one, to get:
y = 4+ 2x
2007-11-16 06:25:35 · answer #3 · answered by David 2 · 1⤊ 0⤋
The first one is correct.
The second one is off by a factor of -1. You have to multiply through by -1 to get +y
2007-11-16 06:30:09 · answer #4 · answered by Jim M 3 · 0⤊ 0⤋
1. correct
2. divide -y by -1 to get 2x+4
2007-11-16 07:04:44 · answer #5 · answered by Dave aka Spider Monkey 7 · 0⤊ 0⤋
First is right
Second : y = 2x +4 (you just forgot to change the minus sign)
2007-11-16 07:03:09 · answer #6 · answered by Anonymous · 0⤊ 0⤋
no
2x - y = -4
move the -y to the right
move the -4 to the left
2x+4=y
then re-write in normal form
y=2x+4
Keep it simple (KIS)
2007-11-16 07:25:29 · answer #7 · answered by Anonymous · 0⤊ 0⤋
Yes.
2007-11-16 06:22:26 · answer #8 · answered by battleship potemkin AM 6 · 0⤊ 1⤋
first is correct
second is incorrect
2x-y=-4
2x=y-4
y=2x+4
2007-11-16 06:24:40 · answer #9 · answered by Theta40 7 · 0⤊ 0⤋