Question

find the value of k for the given education if x=-1and y=-1 is its solution of 9xy+12xy= 105
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Answer 1

Answer:

Let k be x

x+9×-1×-1+12×-1×-1=105

x+9+12=105

x+21=105

x=105-21

x=74

so the value of k is 74