SOLUTION: i do not understand how to figure out the value for x and y in these equations. then i have to put it on a graph also. this example is one problem with graph Y = X + 1 Y = -X -

Algebra ->  Graphs -> SOLUTION: i do not understand how to figure out the value for x and y in these equations. then i have to put it on a graph also. this example is one problem with graph Y = X + 1 Y = -X -      Log On


   

Question 1005323: i do not understand how to figure out the value for x and y in these equations. then i have to put it on a graph also. this example is one problem with graph
Y = X + 1
Y = -X - 1
Found 2 solutions by josgarithmetic, ikleyn:
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
Y = X + 1
slope 1, y-intercept (0,1)

Y = -X - 1
slope -1, y-intercept (0,-1)

That information from the equations lets you make the graph.

Calculating for y and x, you have two formulas for y which should be equated.
x%2B1=-x-1
2x=-2
x=-1 and you can find y using either of the given equations.

graph%28300%2C300%2C-4%2C4%2C-4%2C4%2Cx%2B1%2C-x-1%29

Answer by ikleyn(52781) About Me  (Show Source):
You can put this solution on YOUR website!
.
i do not understand how to figure out the value for x and y in these equations.

Y = X + 1
Y = -X - 1
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Hello,
it is very simple.

Since the left sides are identical,  it means that the right sides are equal,  too.  It gives you an equation

x + 1 = -x - 1.

Simplify and solve:

x + x = -1 - 1,
2x = -2,
x = -1.

Hence,  Y = X + 1 = (-1) + 1 = 0.

Answer.  The solution is  x = -1,  y = 0.