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3.306.42=3.14x^2*13
We move all terms to the left:
3.306.42-(3.14x^2*13)=0
We add all the numbers together, and all the variables
-(3.14x^2*13)+1.38852=0
We get rid of parentheses
-3.14x^2*13+1.38852=0
We move all terms containing x to the left, all other terms to the right
-3.14x^2*13=-1.38852
x=-1.38852/1
x=-1.38852
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