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X-3X=16.80
We move all terms to the left:
X-3X-(16.80)=0
We add all the numbers together, and all the variables
X-3X-(16.8)=0
We add all the numbers together, and all the variables
-2X-16.8=0
We move all terms containing X to the left, all other terms to the right
-2X=16.8
X=16.8/-2
X=-8+0.8/2
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