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100+9x+15-x=20.2210x
We move all terms to the left:
100+9x+15-x-(20.2210x)=0
We add all the numbers together, and all the variables
9x-x-(+20.2210x)+100+15=0
We add all the numbers together, and all the variables
8x-(+20.2210x)+115=0
We get rid of parentheses
8x-20.2210x+115=0
We add all the numbers together, and all the variables
-12.221x+115=0
We move all terms containing x to the left, all other terms to the right
-12.221x=-115
x=-115/-12.221
x=9+4.9564787339268/12.08803165183
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