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10=9.2+0.4x
We move all terms to the left:
10-(9.2+0.4x)=0
We add all the numbers together, and all the variables
-(0.4x+9.2)+10=0
We get rid of parentheses
-0.4x-9.2+10=0
We add all the numbers together, and all the variables
-0.4x+0.8=0
We move all terms containing x to the left, all other terms to the right
-0.4x=-0.8
x=-0.8/-0.4
x=+2
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