7x+3=129

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Solution for 7x+3=129 equation: 



7x+3=129

We move all terms to the left:

7x+3-(129)=0

We add all the numbers together, and all the variables

7x-126=0

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

7x=126

x=126/7

x=18

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