7x+1=3x=21

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Solution for 7x+1=3x=21 equation: 



7x+1=3x=21

We move all terms to the left:

7x+1-(3x)=0

We add all the numbers together, and all the variables

4x+1=0

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

4x=-1

x=-1/4

x=-1/4

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