SOLUTION: My daughter is having trouble with a math problem. I can't figure it out, please explain how to plot this and come up with the answer. Thanks in advance. Solve equation by graphi

Algebra ->  Equations -> SOLUTION: My daughter is having trouble with a math problem. I can't figure it out, please explain how to plot this and come up with the answer. Thanks in advance. Solve equation by graphi      Log On


   

Question 310452: My daughter is having trouble with a math problem. I can't figure it out, please explain how to plot this and come up with the answer.
Thanks in advance.
Solve equation by graphing.
2x + y = 1
y = -2x + 5
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
Solve equation by graphing.
2x + y = 1
y = -2x + 5
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1st Equation:
Solve for "y":
y = -2x+1
Determine and plot two points:
Let x = 0, then y = 1 giving you point(0,1)
---
Let x = 1, then y = -2+1 = -1 giving you point (1.-1)
---
Plot the two points and draw a line thru them.
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2nd Equation:
y = -2x+5
Determine and plot two points:
Let x = 0, then y = 5 giving you point (0,5)
Let x = 1, then y = -2+5 = 3 giving you (1,3)
----
Plot the points and draw a line thru them.
======================================================
graph%28400%2C300%2C-10%2C10%2C-10%2C10%2C-2x%2B1%2C-2x%2B5%29
Find the point of intersection by inspection.
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Answer: The lines are parallel so there is no solution
for the system of two equations.
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Cheers,
Stan H.
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