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(x*3.14/2*3)+9=51.39
We move all terms to the left:
(x*3.14/2*3)+9-(51.39)=0
We add all the numbers together, and all the variables
(+x*3.14/2*3)+9-(51.39)=0
We add all the numbers together, and all the variables
(+x*3.14/2*3)-42.39=0
We get rid of parentheses
x*3.14/2*3-42.39=0
We multiply all the terms by the denominator
x*3.14-(42.39)*2*3=0
We add all the numbers together, and all the variables
x*3.14-254.34=0
Wy multiply elements
3.14x-254.34=0
We move all terms containing x to the left, all other terms to the right
3.14x=254.34
x=254.34/3.14
x=81
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