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45+20x=-5+30x
We move all terms to the left:
45+20x-(-5+30x)=0
We add all the numbers together, and all the variables
20x-(30x-5)+45=0
We get rid of parentheses
20x-30x+5+45=0
We add all the numbers together, and all the variables
-10x+50=0
We move all terms containing x to the left, all other terms to the right
-10x=-50
x=-50/-10
x=+5
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