7x-7x=-9+9

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Solution for 7x-7x=-9+9 equation: 



7x-7x=-9+9

We move all terms to the left:

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

We add all the numbers together, and all the variables

7x-7x-0=0

We add all the numbers together, and all the variables

=0

x=0/1

x=0

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