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0.7x+x+0.01x=1400
We move all terms to the left:
0.7x+x+0.01x-(1400)=0
We add all the numbers together, and all the variables
1.71x-1400=0
We move all terms containing x to the left, all other terms to the right
1.71x=1400
x=1400/1.71
x=818+1/1.4016393442623
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