Question

Can someone please check my work? Please? I would really appreciate it...
Question~
Solve the systems using the substitution method.
x - y = 0
3x + y = -4

Answer 1

My answer~
Solve one equation for either variable~
Y=0+x
In the other equation replace the variable from step 1 with what is equaled:
3x+(0+x)=-4
Solve the equation in step 2 for the other variable:
4x= -4 --- x= 4/-4 = -1
Substitute the value found in step 3 into equation in step 1:
Y=0+-1
Solve equation in step 4:
Y=-1
Write your answer as an ordered pair (x, y).
(4/-4, 0/-1)

Answer 2

What my teacher said was wrong~when you move the x in the 1st equation, it isn't +x

Answer 3

When you move the x in the 1st equation it is -x but you would divide -1 from the y so you would get positive x...

Answer 4

So change this....
Solve one equation for either variable~
Y=0+x

into this...
Solve one equation for either variable~
Y=0-x?

Answer 5

no. You should have y=(x+0)

Answer 6

oh ok, so change it into
Solve one equation for either variable~
Y=(x+0)

Answer 7

ya

Answer 8

ok then what?

Answer 9

do you understand?

Answer 10

somewhat... The first 3 steps I'm little confused with

Answer 11

what is the -x -x for?

Answer 12

Just showing i was subtracting -1x

Answer 13

Oh ok, if I write out the steps will you check to make sure I wrote them out right?

Answer 14

@alexandrea.lane

Answer 15

Solve one equation for either variable~
x- y= 0
-x -x
-y=-x+0
-1 -1
Y=x+0
In the other equation replace the variable from step 1 with what is equaled:
3x+x-0=-4
4x -0= -4
4x= -4
X= -1
Substitute the value found in step 3 into equation in step 1:
-1-y=0
Solve equation in step 4:
Y=-1
Write your answer as an ordered pair (x, y).
(-1,-1)

Answer 16

It should be -0

Answer 17

what part should be?

Answer 18

y=x-0