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x*0.81=2180
We move all terms to the left:
x*0.81-(2180)=0
Wy multiply elements
0.81x-2180=0
We move all terms containing x to the left, all other terms to the right
0.81x=2180
x=2180/0.81
x=2691+0.28999999999996/0.81
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