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Determine the value of k for which the following system of equations becomes consistent : 7x -y=5,21x - 3y=k.

JEE/Engineering Exams
Maths
Solution
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( 7 x-y=5-0 ) ( 21 x-3 y=k-2 ) ( Rightarrow i n quad 2 ) ( 2 x-3 y=k ) take 3 common ( 3(7 k-y)=k ) now trom ( 3(5)=k ) ( 15=k )