NCERT Exemplar Solutions
Class 10 - Mathematics - CHAPTER 3: Pair of Linear Equations in Two Variables - Exercise 3.3
Question 5

Question. 5

The paths \(x - 3y = 2\) and \(-2x + 6y = 5\) represent straight lines. Do the paths cross each other?

Answer:

No. They are parallel and distinct.

Detailed Answer with Explanation:

Step 1: Write the first line equation:

\(x - 3y = 2\)

Step 2: Multiply the whole equation by \(-2\) so that the \(x\)-term looks like the second equation:

\(-2) \times (x - 3y) = (-2) \times 2\)

\(-2x + 6y = -4\)

Step 3: Now compare with the second line:

\(-2x + 6y = 5\)

Step 4: The left-hand sides are the same (\(-2x + 6y\)).

But the right-hand sides are different: one is \(-4\) and the other is \(5\).

Step 5: This means both lines have the same slope, so they are parallel.

Since the constants are not equal, they are not the same line — they are distinct.

Final Answer: Parallel and distinct lines never meet. So the paths do not cross each other.

NCERT Exemplar Solutions Class 10 – Mathematics – CHAPTER 3: Pair of Linear Equations in Two Variables – Exercise 3.3 | Detailed Answers