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1.065x+1.035x+1.015x=7785.50
We move all terms to the left:
1.065x+1.035x+1.015x-(7785.50)=0
We add all the numbers together, and all the variables
1.065x+1.035x+1.015x-(7785.5)=0
We add all the numbers together, and all the variables
3.115x-7785.5=0
We move all terms containing x to the left, all other terms to the right
3.115x=7785.5
x=7785.5/3.115
x=2499+1/2.7937219730947
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