7x=3+12

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Solution for 7x=3+12 equation: 



7x=3+12

We move all terms to the left:

7x-(3+12)=0

We add all the numbers together, and all the variables

7x-15=0

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

7x=15

x=15/7

x=2+1/7

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