Answer :

Answer:

-x

Step-by-step explanation:

Get 3x to the right side then divide by 3

Answer:

The answer is -1.

Step-by-step explanation:

3x+3y=72

-3x        -3x

3y=-3x+72/3

3y/3=-3x+72/3

y=-1x+24

slope of given line: -1

Slope of a parallel line: -1

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