Question 217292: Im trying to figure out how to solve this problem. Im not sure how to slove the systems of equations graphically.
y=3x-12
y=4x+2
Found 2 solutions by checkley77, stanbon:
Answer by checkley77(12844)   (Show Source):
You can put this solution on YOUR website! y=3x-12
y=4x+2
You can either set these 2 equation equal to one another.
3x-12=4x+2
3x-4x=2+12
-x=14
x=-14 ans.
OR:
Multiply one of the equations by -1 & add them
-y=-3x+12
y=4x+2
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0=x+14
x=-14 ans.
y=3*-14-12
y=-42-12
y=-54 ans.
Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! Im not sure how to solve the systems of equations graphically.
y=3x-12
y=4x+2
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Plot a couple of points and draw a line thru them.
Y = 3x-12
Let x = 0, then y = -12 giving you point (0,-12)
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Let x = 2, the y = -6 giving you point (2,-6)
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y = 4x+2
Let x = 0, then y = 2 giving you point (0,2)
Let x = 2, then y = 10 giving you point (2,10)
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Put both graphs on the same coordinate system and determine the
point of intersection:
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Solution: (-14,-54)
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Cheers,
Stan H.
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