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8.9=1.3+x
We move all terms to the left:
8.9-(1.3+x)=0
We add all the numbers together, and all the variables
-(x+1.3)+8.9=0
We get rid of parentheses
-x-1.3+8.9=0
We add all the numbers together, and all the variables
-1x+7.6=0
We move all terms containing x to the left, all other terms to the right
-x=-7.6
x=-7.6/-1
x=7+0.6/1
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