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89.7=3.7891x+155.38
We move all terms to the left:
89.7-(3.7891x+155.38)=0
We get rid of parentheses
-3.7891x-155.38+89.7=0
We add all the numbers together, and all the variables
-3.7891x-65.68=0
We move all terms containing x to the left, all other terms to the right
-3.7891x=65.68
x=65.68/-3.7891
x=-17+1/2.99462578045
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