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3.2-(-5.7)=x
We move all terms to the left:
3.2-(-5.7)-(x)=0
We add all the numbers together, and all the variables
-1x+8.9=0
We move all terms containing x to the left, all other terms to the right
-x=-8.9
x=-8.9/-1
x=8+0.9/1
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