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Question: Answered & Verified by Expert
What is equation of straight line pass through the point of
intersection of the line $\frac{x}{2}+\frac{y}{3}=1$ and $\frac{x}{3}+\frac{y}{2}=1$, and parallel the $4 \mathrm{x}+5 \mathrm{y}-6=0 ?$
MathematicsStraight LinesNDANDA 2018 (Phase 2)
Options:
  • A $20 \mathrm{x}+25 \mathrm{y}-54=0$
  • B $25 x+20 y-54=0$
  • C $4 x+5 y-54=0$
  • D $4 x+5 y-45=0$
Solution:
2222 Upvotes Verified Answer
The correct answer is: $20 \mathrm{x}+25 \mathrm{y}-54=0$
Given equatiosns: $\frac{x}{2}+\frac{y}{3}=1$ and $\frac{x}{3}+\frac{y}{2}=1$
Point of intersection $=\left(\frac{6}{5}, \frac{6}{5}\right)$
Let equation of line be $4 x+5 y+k=0$
Putting $\left(\frac{6}{5}, \frac{6}{5}\right), k=-\frac{54}{5}$
Equation of line is $20 x+25 y-54=0$

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