Question

To eliminate x, from 3x+y=7 and x+2y=2 second equation is multiplied by ......,select a proper option (a), (b), (c) or (d) from given options so that the statement becomes correct.
(a) 1
(b) 2
(c) 3
(d)-1

Answer 1

Thus option C is correct
Hope this helps you...

Answer 2

Option ( c ) is correct.

Explanation :

Given pair linear equations ,

3x + y = 7 ----( 1 )

x + 2y = 2 -----( 2 )

[ ( 1 ) - 3 × ( 2 ) ] we get,

3x + y = 7

3x + 6y = 6
__________
**** -5y = 1

=> y = 1/(-5)

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