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4=x+45/45
We move all terms to the left:
4-(x+45/45)=0
We add all the numbers together, and all the variables
-(x+1)+4=0
We get rid of parentheses
-x-1+4=0
We add all the numbers together, and all the variables
-1x+3=0
We move all terms containing x to the left, all other terms to the right
-x=-3
x=-3/-1
x=+3
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