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5.6x+8.1=-8.7
We move all terms to the left:
5.6x+8.1-(-8.7)=0
We add all the numbers together, and all the variables
5.6x+16.8=0
We move all terms containing x to the left, all other terms to the right
5.6x=-16.8
x=-16.8/5.6
x=-3+3.5527136788005E-15/5.6
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