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0.2x+0.1=-0.4x-2.5
We move all terms to the left:
0.2x+0.1-(-0.4x-2.5)=0
We get rid of parentheses
0.2x+0.4x+2.5+0.1=0
We add all the numbers together, and all the variables
0.6x+2.6=0
We move all terms containing x to the left, all other terms to the right
0.6x=-2.6
x=-2.6/0.6
x=-4+0.2/0.6
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