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0.115x+0.06(30.000-x)=2.790
We move all terms to the left:
0.115x+0.06(30.000-x)-(2.790)=0
We add all the numbers together, and all the variables
0.115x+0.06(-1x+30)-(2.79)=0
We add all the numbers together, and all the variables
0.115x+0.06(-1x+30)-2.79=0
We multiply parentheses
0.115x-0.06x+1.8-2.79=0
We add all the numbers together, and all the variables
0.055x-0.99=0
We move all terms containing x to the left, all other terms to the right
0.055x=0.99
x=0.99/0.055
x=18
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