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-6.9-3x=-3.6
We move all terms to the left:
-6.9-3x-(-3.6)=0
We add all the numbers together, and all the variables
-3x-3.3=0
We move all terms containing x to the left, all other terms to the right
-3x=3.3
x=3.3/-3
x=-1+0.3/3
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