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Question

Find the equation of a line passing through the point (2,3) and parallel to the line 2x3y+8=0.

A
2x3y=5
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B
2x3y=12
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C
x3y=4
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D
3x2y=7
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Solution

The correct option is B 2x3y=5
First we find the slope of the line 2x3y+8=0 by placing it into slope intercept form:
2x3y+8=0
3y=2x8
3y=2x+8
y=23x+83
Therefore, the slope of the line is m=23.
Now since the equation of the line with slope m passing through a point (x1,y1) is
yy1=m(xx1)
Here the point is (2,3) and slope is m=23, therefore, the equation of the line is:
y3=23(x2)3(y3)=2(x2)3y9=2x42x3y=9+42x3y=5
Hence, the equation of the line is 2x3y=5.

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