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5x-8/21=4x+5/21
We move all terms to the left:
5x-8/21-(4x+5/21)=0
We add all the numbers together, and all the variables
5x-(+4x+5/21)-8/21=0
We get rid of parentheses
5x-4x-5/21-8/21=0
We multiply all the terms by the denominator
5x*21-4x*21-5-8=0
We add all the numbers together, and all the variables
5x*21-4x*21-13=0
Wy multiply elements
105x-84x-13=0
We add all the numbers together, and all the variables
21x-13=0
We move all terms containing x to the left, all other terms to the right
21x=13
x=13/21
x=13/21
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