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0.12x+200=450
We move all terms to the left:
0.12x+200-(450)=0
We add all the numbers together, and all the variables
0.12x-250=0
We move all terms containing x to the left, all other terms to the right
0.12x=250
x=250/0.12
x=2083+0.04000000000002/0.12
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