Hi

standard form of a line is in the form Ax + By = C , where a is positive.

Performing the operations necessary to have this format:

1. y = x+9     |subtracting  y and 9 from both sides of the equation

   -9 = x - y   |in the form Ax + By = C

OR   x - y = -9

2. y = 3x + 7   |subtracting  y and 7 from both sides of the equation

   -7 = 3x - y

OR     3x - y = -7  |in the form Ax + By = C

3. y  = 4x + 8 |subtracting  y and 8 from both sides of the equation

   -8 = 4x - y

OR      4x - y = -8  |in the form Ax + By = C

 

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