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1=0.4x-0.8x-11
We move all terms to the left:
1-(0.4x-0.8x-11)=0
We add all the numbers together, and all the variables
-(-0.4x-11)+1=0
We get rid of parentheses
0.4x+11+1=0
We add all the numbers together, and all the variables
0.4x+12=0
We move all terms containing x to the left, all other terms to the right
0.4x=-12
x=-12/0.4
x=-30
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