)Find the value of k, if the pair of linear equations 3x + 4y=k and 9x =6 - 12y has infinitely many solutions.
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Arranging in the form of linear equation
3x+4y-k=0
9x+12y-6=0
For infinitely many solutions
a1/a2=b1/b2=c1/c2
3/9=4/12=-k/-6
1/3=k/6
k= 2
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