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40/2=x/7
We move all terms to the left:
40/2-(x/7)=0
We add all the numbers together, and all the variables
-(+x/7)+40/2=0
We add all the numbers together, and all the variables
-(+x/7)+20=0
We get rid of parentheses
-x/7+20=0
We multiply all the terms by the denominator
-x+20*7=0
We add all the numbers together, and all the variables
-1x+140=0
We move all terms containing x to the left, all other terms to the right
-x=-140
x=-140/-1
x=+140
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