Question

find k in each case if x=2,y=1 is a solution of the equation.
1)3x+2y=k
2)2x-ky=6
3) x/4+y/3=5k

Answer 1

1) 8
2)-2
3)1/6
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Answer 2

1)3×2+2×1=k
or,6+2=k
or,k=8.

2)2×2-k×1=k
or,4-k=6
or,4-6=k
or,k = -2.

3)2/4+1/3 = 5k
or 1/2+1/3 = 5k
or, (3+2)/6 = 5k
or,5/7= 5k
or, 5/7×5 = k
or, k = 5/35
or,k = 1/6