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X-10=4X+9
We move all terms to the left:
X-10-(4X+9)=0
We get rid of parentheses
X-4X-9-10=0
We add all the numbers together, and all the variables
-3X-19=0
We move all terms containing X to the left, all other terms to the right
-3X=19
X=19/-3
X=-6+1/3
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