Question

(1) If x = 1, y = - 2 is a solution of pair of linear equation
3 x + ay = 6 and ax - 2y = 1 then a =
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Answer 1

3x+ay=6

3(1)+a(-2)=6

3-2a=6

-2a=3

a=-3/2

and,a(1)-2(-2)=1

a+4=1

a=-3

mark it as brainlist pls

Answer 2

3x +ay=6

x=1

y=-2

now,

3×1+ a×(-2)=6

3-2a = 6

-2a=3

a=-(3/2)

ax-2y=1

a×1-2×(-2)=1

a+4=1

a=1-4

a=-3

please mark it as brainlist. ......❤