6+x+7x=78

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Solution for 6+x+7x=78 equation: 



6+x+7x=78

We move all terms to the left:

6+x+7x-(78)=0

We add all the numbers together, and all the variables

8x-72=0

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

8x=72

x=72/8

x=9

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