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0.4x-1.38=0.3x-1.2
We move all terms to the left:
0.4x-1.38-(0.3x-1.2)=0
We get rid of parentheses
0.4x-0.3x+1.2-1.38=0
We add all the numbers together, and all the variables
0.1x-0.18=0
We move all terms containing x to the left, all other terms to the right
0.1x=0.18
x=0.18/0.1
x=1+0.08/0.1
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