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1.2+0.1x=0.8-12.1
We move all terms to the left:
1.2+0.1x-(0.8-12.1)=0
We add all the numbers together, and all the variables
0.1x+1.2-(-11.3)=0
We add all the numbers together, and all the variables
0.1x+12.5=0
We move all terms containing x to the left, all other terms to the right
0.1x=-12.5
x=-12.5/0.1
x=-125
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