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X+(-4X)=7
We move all terms to the left:
X+(-4X)-(7)=0
We get rid of parentheses
X-4X-7=0
We add all the numbers together, and all the variables
-3X-7=0
We move all terms containing X to the left, all other terms to the right
-3X=7
X=7/-3
X=-2+1/3
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