Can someone solve these simultaneous equations?
a.) 2^x+y=8
3^2x-y=27
b.) 3^y+x=9^y+x
2^x-y=8^x-3

a) x = 2, y = 1

b) x = 9, y = -9

Step-by-step explanation:

a)    

   ⇒

   ⇒

and

  ⇒

  ⇒

By solving the above two equations, we get;

x = 2 and y = 1

b)    

   ⇒

   ⇒

and

   ⇒

   ⇒

By solving the above two equations, we get;

x = 9 and y = -9

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step-by-step explanation:

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$4

step-by-step explanation:

$30×5=$150

$150 minus $130=$20

$20÷5=$4.

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