7x+x-4=12

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Solution for 7x+x-4=12 equation: 



7x+x-4=12

We move all terms to the left:

7x+x-4-(12)=0

We add all the numbers together, and all the variables

8x-16=0

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

8x=16

x=16/8

x=2

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