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7.8x-9.8=5.8
We move all terms to the left:
7.8x-9.8-(5.8)=0
We add all the numbers together, and all the variables
7.8x-15.6=0
We move all terms containing x to the left, all other terms to the right
7.8x=15.6
x=15.6/7.8
x=2
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