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.2x=0.9-0.1x
We move all terms to the left:
.2x-(0.9-0.1x)=0
We add all the numbers together, and all the variables
.2x-(-0.1x+0.9)=0
We get rid of parentheses
.2x+0.1x-0.9=0
We add all the numbers together, and all the variables
0.3x-0.9=0
We move all terms containing x to the left, all other terms to the right
0.3x=0.9
x=0.9/0.3
x=3+1.11022302463E-16/0.3
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