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21/3=7x/6
We move all terms to the left:
21/3-(7x/6)=0
We add all the numbers together, and all the variables
-(+7x/6)+21/3=0
We add all the numbers together, and all the variables
-(+7x/6)+7=0
We get rid of parentheses
-7x/6+7=0
We multiply all the terms by the denominator
-7x+7*6=0
We add all the numbers together, and all the variables
-7x+42=0
We move all terms containing x to the left, all other terms to the right
-7x=-42
x=-42/-7
x=+6
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