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3.20+7x=6x-7.80
We move all terms to the left:
3.20+7x-(6x-7.80)=0
We add all the numbers together, and all the variables
7x-(6x-7.8)+3.20=0
We add all the numbers together, and all the variables
7x-(6x-7.8)+3.2=0
We get rid of parentheses
7x-6x+7.8+3.2=0
We add all the numbers together, and all the variables
x+11=0
We move all terms containing x to the left, all other terms to the right
x=-11
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