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0.04+0.07(12000-x)=720
We move all terms to the left:
0.04+0.07(12000-x)-(720)=0
We add all the numbers together, and all the variables
0.07(-1x+12000)+0.04-720=0
We add all the numbers together, and all the variables
0.07(-1x+12000)-719.96=0
We multiply parentheses
-0.07x+840-719.96=0
We add all the numbers together, and all the variables
-0.07x+120.04=0
We move all terms containing x to the left, all other terms to the right
-0.07x=-120.04
x=-120.04/-0.07
x=1714+0.06/0.07
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