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4000=x-(x*0.79)
We move all terms to the left:
4000-(x-(x*0.79))=0
We add all the numbers together, and all the variables
-(x-(+x*0.79))+4000=0
We calculate terms in parentheses: -(x-(+x*0.79)), so:We add all the numbers together, and all the variables
x-(+x*0.79)
We get rid of parentheses
x-x*0.79
Wy multiply elements
x-0.79x
We add all the numbers together, and all the variables
0.21x
Back to the equation:
-(0.21x)
-(+0.21x)+4000=0
We get rid of parentheses
-0.21x+4000=0
We move all terms containing x to the left, all other terms to the right
-0.21x=-4000
x=-4000/-0.21
x=19047+0.13000000000011/0.21
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