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0.2x-0.9=2.5
We move all terms to the left:
0.2x-0.9-(2.5)=0
We add all the numbers together, and all the variables
0.2x-3.4=0
We move all terms containing x to the left, all other terms to the right
0.2x=3.4
x=3.4/0.2
x=17+-4.4408920985006E-16/0.2
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