21x+6=7x+13

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Solution for 21x+6=7x+13 equation: 



21x+6=7x+13

We move all terms to the left:

21x+6-(7x+13)=0

We get rid of parentheses

21x-7x-13+6=0

We add all the numbers together, and all the variables

14x-7=0

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

14x=7

x=7/14

x=1/2

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