Find the value of x if  and 

This question was previously asked in
ISRO VSSC Technician-B (Fitter) Official Paper (Held On: 14 July 2021)
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  1. 9
  2. 4
  3. 5
  4. 8

Answer (Detailed Solution Below)

Option 1 : 9
Free
ISRO Technician B: Fitter Full Test 1
60 Qs. 180 Marks 90 Mins

Detailed Solution

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Explanation:

∵  ............................ (1)

And  ................... (2)

Square both equations:

⇒ x - y = 4 .................................. (3)

And 

⇒ x + y = 14 ............................... (4)

On adding equations (3) and (4), we get:

2x = 18

⇒ x = 9

Putting the value of x in equation (4), we get:

9 + y = 14

⇒ y = 5

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