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(2x+2.50)*1.08+3=13.80
We move all terms to the left:
(2x+2.50)*1.08+3-(13.80)=0
We add all the numbers together, and all the variables
(2x+2.5)*1.08+3-(13.8)=0
We add all the numbers together, and all the variables
(2x+2.5)*1.08-10.8=0
We multiply parentheses
2.16x+2.7-10.8=0
We add all the numbers together, and all the variables
2.16x-8.1=0
We move all terms containing x to the left, all other terms to the right
2.16x=8.1
x=8.1/2.16
x=3+1/1.3333333333333
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