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250+0.3c=200+0.8c
We move all terms to the left:
250+0.3c-(200+0.8c)=0
We add all the numbers together, and all the variables
0.3c-(0.8c+200)+250=0
We get rid of parentheses
0.3c-0.8c-200+250=0
We add all the numbers together, and all the variables
-0.5c+50=0
We move all terms containing c to the left, all other terms to the right
-0.5c=-50
c=-50/-0.5
c=+100
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