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21/3+w=42/9
We move all terms to the left:
21/3+w-(42/9)=0
We add all the numbers together, and all the variables
w+21/3-(+42/9)=0
We add all the numbers together, and all the variables
w+7-(+42/9)=0
We get rid of parentheses
w+7-42/9=0
We multiply all the terms by the denominator
w*9-42+7*9=0
We add all the numbers together, and all the variables
w*9+21=0
Wy multiply elements
9w+21=0
We move all terms containing w to the left, all other terms to the right
9w=-21
w=-21/9
w=-2+1/3
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