The value of k for which the lines 5x+7y=3 and 15x+21y = k coincide is
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Answered by
6
Answer:
a₁/a₂ = b₁/b₂ = c₁/c₂ (infinite solutions and line coincide each other )
5x+7y=3 and 15x + 21y = k coincide
=> 5/15 = 7/21 = 3/k
=> 1/3 = 1/3 = 3/k
=> k = 9
Answered by
0
Answer:
k=9
Step-by-step explanation:
(5x+7y=3) x 3 = 15x+21y=9
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