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-1.28=x-21.1/3.145402288
We move all terms to the left:
-1.28-(x-21.1/3.145402288)=0
We add all the numbers together, and all the variables
-(+x-21.1/3.145402288)-1.28=0
We get rid of parentheses
-x-1.28+21.1/3.145402288=0
We multiply all the terms by the denominator
-x*3.145402288+21.1-(1.28)*3.145402288=0
We add all the numbers together, and all the variables
-x*3.145402288+17.07388507136=0
Wy multiply elements
-3.145402288x+17.07388507136=0
We move all terms containing x to the left, all other terms to the right
-3.145402288x=-17.07388507136
x=-17.07388507136/-3.145402288
x=5+1/2.335335858364
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