the value of k for which lines 5 x + 7 Y equal to 3 and 15x + 21 Y equal to K coincide is
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Answer:
K not equal to 3
Step-by-step explanation:
for a pair of coinciding lines,
a1/a2 = b1/b2 not equal to c1/c2
here,
a1=5 b1=7 c1=3
a2=15 b2=21 c2=K
a1/a2=1/3
b1/2=1/3
which implies,
c1/c2 not equal to 1/3.
Therefore, we get K not equal to 1/3, which means, for any value other that 3, the pair of lines would coincide.
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