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12.98+0.12x=13.73-0.09x
We move all terms to the left:
12.98+0.12x-(13.73-0.09x)=0
We add all the numbers together, and all the variables
0.12x-(-0.09x+13.73)+12.98=0
We get rid of parentheses
0.12x+0.09x-13.73+12.98=0
We add all the numbers together, and all the variables
0.21x-0.75=0
We move all terms containing x to the left, all other terms to the right
0.21x=0.75
x=0.75/0.21
x=3+0.12/0.21
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