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25-x=3x-45
We move all terms to the left:
25-x-(3x-45)=0
We add all the numbers together, and all the variables
-1x-(3x-45)+25=0
We get rid of parentheses
-1x-3x+45+25=0
We add all the numbers together, and all the variables
-4x+70=0
We move all terms containing x to the left, all other terms to the right
-4x=-70
x=-70/-4
x=17+1/2
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