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2/7+x/7=51/7
We move all terms to the left:
2/7+x/7-(51/7)=0
We add all the numbers together, and all the variables
x/7+2/7-(+51/7)=0
We get rid of parentheses
x/7+2/7-51/7=0
We multiply all the terms by the denominator
x+2-51=0
We add all the numbers together, and all the variables
x-49=0
We move all terms containing x to the left, all other terms to the right
x=49
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