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1680+x(145.50)=3426.00
We move all terms to the left:
1680+x(145.50)-(3426.00)=0
We add all the numbers together, and all the variables
x(145.5)+1680-3426=0
We add all the numbers together, and all the variables
x(145.5)-1746=0
We multiply parentheses
145.5x-1746=0
We move all terms containing x to the left, all other terms to the right
145.5x=1746
x=1746/145.5
x=12
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