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(x*1.06)*0.78=7500
We move all terms to the left:
(x*1.06)*0.78-(7500)=0
We add all the numbers together, and all the variables
(+x*1.06)*0.78-7500=0
We multiply parentheses
0.8268x-7500=0
We move all terms containing x to the left, all other terms to the right
0.8268x=7500
x=7500/0.8268
x=9071+0.097200000000157/0.8268
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