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(9+x)/7=11-x
We move all terms to the left:
(9+x)/7-(11-x)=0
We add all the numbers together, and all the variables
(x+9)/7-(-1x+11)=0
We get rid of parentheses
(x+9)/7+1x-11=0
We multiply all the terms by the denominator
(x+9)+1x*7-11*7=0
We add all the numbers together, and all the variables
(x+9)+1x*7-77=0
Wy multiply elements
(x+9)+7x-77=0
We get rid of parentheses
x+7x+9-77=0
We add all the numbers together, and all the variables
8x-68=0
We move all terms containing x to the left, all other terms to the right
8x=68
x=68/8
x=8+1/2
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