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0.7(x+200)=0.77x-385
We move all terms to the left:
0.7(x+200)-(0.77x-385)=0
We multiply parentheses
0.7x-(0.77x-385)+140=0
We get rid of parentheses
0.7x-0.77x+385+140=0
We add all the numbers together, and all the variables
-0.07x+525=0
We move all terms containing x to the left, all other terms to the right
-0.07x=-525
x=-525/-0.07
x=7499+0.069999999999936/0.07
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