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90.76=89+x
We move all terms to the left:
90.76-(89+x)=0
We add all the numbers together, and all the variables
-(x+89)+90.76=0
We get rid of parentheses
-x-89+90.76=0
We add all the numbers together, and all the variables
-1x+1.76=0
We move all terms containing x to the left, all other terms to the right
-x=-1.76
x=-1.76/-1
x=1+0.76/1
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