Question 217292
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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{{{graph(400,300,-10,10,-10,10,3x-12)}}}
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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)
{{{graph(400,300,-10,10,-10,10,4x+2)}}}
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Put both graphs on the same coordinate system and determine the
point of intersection:
{{{graph(400,300,-20,50,-60,50,3x-12,4x+2)}}}
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Solution: (-14,-54)
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Cheers,
Stan H.