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3=4x-25
We move all terms to the left:
3-(4x-25)=0
We get rid of parentheses
-4x+25+3=0
We add all the numbers together, and all the variables
-4x+28=0
We move all terms containing x to the left, all other terms to the right
-4x=-28
x=-28/-4
x=+7
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