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(x+0.21x)-0.15x=2160
We move all terms to the left:
(x+0.21x)-0.15x-(2160)=0
We add all the numbers together, and all the variables
(+1.21x)-0.15x-2160=0
We add all the numbers together, and all the variables
-0.15x+(+1.21x)-2160=0
We get rid of parentheses
-0.15x+1.21x-2160=0
We add all the numbers together, and all the variables
1.06x-2160=0
We move all terms containing x to the left, all other terms to the right
1.06x=2160
x=2160/1.06
x=2037+0.77999999999975/1.06
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