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6.4=8.5-0.3x
We move all terms to the left:
6.4-(8.5-0.3x)=0
We add all the numbers together, and all the variables
-(-0.3x+8.5)+6.4=0
We get rid of parentheses
0.3x-8.5+6.4=0
We add all the numbers together, and all the variables
0.3x-2.1=0
We move all terms containing x to the left, all other terms to the right
0.3x=2.1
x=2.1/0.3
x=7
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