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0.7+0.3x=0.2x+0.4
We move all terms to the left:
0.7+0.3x-(0.2x+0.4)=0
We get rid of parentheses
0.3x-0.2x-0.4+0.7=0
We add all the numbers together, and all the variables
0.1x+0.3=0
We move all terms containing x to the left, all other terms to the right
0.1x=-0.3
x=-0.3/0.1
x=-2+0.1/0.1
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