Question

find the value of a if (-1,1) is a solution of 5x-ay=7​

Answer 1

5x-ay=7

5×(-1)-a×1=7

-5-a=7

-a=7+5

a=-12

Answer 2

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• find the value of a if (-1,1) is a solution of 5x-ay=7

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$5x - ay =7$

$\implies5 \times - 1 - a \times 1 = 7$

$\implies - 5 - a = 7$

$\implies - 5 - 7 = a$

$\implies a = - 12$

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• The value of a is -12.