9x+7x=72;3x+5x=42

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Solution for 9x+7x=72;3x+5x=42 equation: 



9x+7x=723x+5x=42

We move all terms to the left:

9x+7x-(723x+5x)=0

We add all the numbers together, and all the variables

9x+7x-(+728x)=0

We add all the numbers together, and all the variables

16x-(+728x)=0

We get rid of parentheses

16x-728x=0

We add all the numbers together, and all the variables

-712x=0

x=0/-712

x=0

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