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75=103-x
We move all terms to the left:
75-(103-x)=0
We add all the numbers together, and all the variables
-(-1x+103)+75=0
We get rid of parentheses
1x-103+75=0
We add all the numbers together, and all the variables
x-28=0
We move all terms containing x to the left, all other terms to the right
x=28
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