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6x+5=6x+21x=
We move all terms to the left:
6x+5-(6x+21x)=0
We add all the numbers together, and all the variables
6x-(+27x)+5=0
We get rid of parentheses
6x-27x+5=0
We add all the numbers together, and all the variables
-21x+5=0
We move all terms containing x to the left, all other terms to the right
-21x=-5
x=-5/-21
x=5/21
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