SOLUTION: how do you find where two lines cross with out graphing them; for example: y = 2x + 4 and y = .5x - 2. I tried setting the equations the same and solving, but it did not turn o

Algebra ->  Linear-equations -> SOLUTION: how do you find where two lines cross with out graphing them; for example: y = 2x + 4 and y = .5x - 2. I tried setting the equations the same and solving, but it did not turn o      Log On


   

Question 136729This question is from textbook The Shapes of Algebra, Linear System and Inequalities
: how do you find where two lines cross with out graphing them; for example: y = 2x + 4 and y = .5x - 2. I tried setting the equations the same and solving, but it did not turn out the same as when i graphed them. This question is from textbook The Shapes of Algebra, Linear System and Inequalities

Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
find where two lines cross with out graphing them; for example: y = 2x + 4 and y = .5x - 2. I tried setting the equations the same and solving, but it did not turn out the same as when i graphed them.
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2x+4 = 0.5x-2
1.5x = -6
x = -4
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Substitute to solve for "y":
y = 2*-4+4
y = -4
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Solution: (-4,-4)
graph%28400%2C300%2C-10%2C10%2C-10%2C10%2C2x%2B4%2C0.5x-2%29
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Cheers,
Stan H.