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0.85x+14000-0.25x=900
We move all terms to the left:
0.85x+14000-0.25x-(900)=0
We add all the numbers together, and all the variables
0.6x+13100=0
We move all terms containing x to the left, all other terms to the right
0.6x=-13100
x=-13100/0.6
x=-21833+0.20000000000073/0.6
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