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190=X+2X
We move all terms to the left:
190-(X+2X)=0
We add all the numbers together, and all the variables
-(+3X)+190=0
We get rid of parentheses
-3X+190=0
We move all terms containing X to the left, all other terms to the right
-3X=-190
X=-190/-3
X=63+1/3
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