Question

find the value of 'a' so that x=1 and y=-1 is a solution of the linear equation 9ax+12ay=63

Answer 1

The answer of this question is -21
because x=1
y=-1
9a(1)+12a(-1)=63
9a+(-12a)=63
9a-12a=63
-3a=63
-a=63/3
-a=21
a=-21
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Answer 2

Answer:

Hope it's help you

Step-by-step explanation: