Find the value of a . If each of the following equation has x = - 1 , y = 1 as a solution: i. x + ay = 6 ii. 5x + 2ay = 3a iii. 9ax + 12ay = 63
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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
Step-by-step explanation:
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