Question

for what value of k the system o of equation has unique solution x + y =k,2 x + 2y=7

Answer 1

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HERE IT IS GIVEN...........
unique solution x + y =k,2 x + 2y=7
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we know that.......
for unique solution....
a1/a2= b1/b2 is called to not c1/c2

so......
here........
a1/a2 =1/2
for unique solution
c1/c2 is called to not 1/2

hence....
k is called to not 7/2..
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