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-0.69x+0.39x=7.2
We move all terms to the left:
-0.69x+0.39x-(7.2)=0
We add all the numbers together, and all the variables
-0.3x-7.2=0
We move all terms containing x to the left, all other terms to the right
-0.3x=7.2
x=7.2/-0.3
x=-24+8.8817841970013E-16/0.3
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