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4x + 3y = 5 . Multiply this by 3.
6x - 4y = -18 . Multiply this by 2.
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12x+9y=15
12x-8y=-36 . Subtract this from above.
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17y=51
y=3
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4x+3y=5 Put in value for y.
4x+3(3)=5
4x+9=5
4x=-4
x=-1
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ANSWER 1: First Question: x=-1, y=3
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First equation:
-12x-2y=7
-2y=12x+7
y=-6-(7/2)
Slope=-6
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Second equation:
18x + 3y = -18 , Divide by 3
6x+y=-6 . Multiply by 2.
12x+2y=-12
2y=-12x-12
y=-6x-2
Slope=-6
Slopes of these two lines are equal. No intersection.
ANSWER 2: Question 2 - Inconsistent system.
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