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4x+7.7=4.2x+6.04
We move all terms to the left:
4x+7.7-(4.2x+6.04)=0
We get rid of parentheses
4x-4.2x-6.04+7.7=0
We add all the numbers together, and all the variables
-0.2x+1.66=0
We move all terms containing x to the left, all other terms to the right
-0.2x=-1.66
x=-1.66/-0.2
x=8+0.06/0.2
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