2x+9-9=87-9

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Solution for 2x+9-9=87-9 equation: 



2x+9-9=87-9

We move all terms to the left:

2x+9-9-(87-9)=0

We add all the numbers together, and all the variables

2x+9-9-78=0

We add all the numbers together, and all the variables

2x-78=0

We move all terms containing x to the left, all other terms to the right

2x=78

x=78/2

x=39

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