Answer :

AL2006

       3x + y = 25

To solve for  'y' ...

Subtract  3x  from each side:    y = 25 - 3x
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3x + y = 25

To solve for  'x' ...

Subtract 'y'  from each side:    3x = 25 - y

Divide each side by  3 :            x = (25 - y) / 3 


If you subtract 3x from both sides you get y=25-3x. If you subtract y from both sides you then you divide both sides by three you get x=25-y/3. You can't get a specific answer

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