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0.5x-0.12=0.4x+0.2
We move all terms to the left:
0.5x-0.12-(0.4x+0.2)=0
We get rid of parentheses
0.5x-0.4x-0.2-0.12=0
We add all the numbers together, and all the variables
0.1x-0.32=0
We move all terms containing x to the left, all other terms to the right
0.1x=0.32
x=0.32/0.1
x=3+0.02/0.1
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