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(10+2x)/3=7
We move all terms to the left:
(10+2x)/3-(7)=0
We add all the numbers together, and all the variables
(2x+10)/3-7=0
We multiply all the terms by the denominator
(2x+10)-7*3=0
We add all the numbers together, and all the variables
(2x+10)-21=0
We get rid of parentheses
2x+10-21=0
We add all the numbers together, and all the variables
2x-11=0
We move all terms containing x to the left, all other terms to the right
2x=11
x=11/2
x=5+1/2
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