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7.8=6x/5+7.1
We move all terms to the left:
7.8-(6x/5+7.1)=0
We get rid of parentheses
-6x/5-7.1+7.8=0
We multiply all the terms by the denominator
-6x-(7.1)*5+(7.8)*5=0
We add all the numbers together, and all the variables
-6x+3.5=0
We move all terms containing x to the left, all other terms to the right
-6x=-3.5
x=-3.5/-6
x=1/1.7142857142857
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