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.9=1+x
We move all terms to the left:
.9-(1+x)=0
We add all the numbers together, and all the variables
-(x+1)+.9=0
We add all the numbers together, and all the variables
-(x+1)+0.9=0
We get rid of parentheses
-x-1+0.9=0
We add all the numbers together, and all the variables
-1x-0.1=0
We move all terms containing x to the left, all other terms to the right
-x=0.1
x=0.1/-1
x=-0.1/1
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