You can put this solution on YOUR website! Do it like this one:
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Use the intercept method to graph each question:
3x+ 4y=12
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At the x-int, y = 0
3x + 0 = 12
x = 4 --> (4,0)
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At the y-int, x = 0
y = 3 --> (0,3)
Plot the 2 points, draw a line thru them.