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2.6x=-7.8
We move all terms to the left:
2.6x-(-7.8)=0
We add all the numbers together, and all the variables
2.6x+7.8=0
We move all terms containing x to the left, all other terms to the right
2.6x=-7.8
x=-7.8/2.6
x=-3+-8.881784197E-16/2.6
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