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0.05x=x-3.99
We move all terms to the left:
0.05x-(x-3.99)=0
We get rid of parentheses
0.05x-x+3.99=0
We add all the numbers together, and all the variables
-0.95x+3.99=0
We move all terms containing x to the left, all other terms to the right
-0.95x=-3.99
x=-3.99/-0.95
x=4+0.19/0.95
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