9+5(1+4.5x)=20.5

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Solution for 9+5(1+4.5x)=20.5 equation: 



9+5(1+4.5x)=20.5

We move all terms to the left:

9+5(1+4.5x)-(20.5)=0

We add all the numbers together, and all the variables

5(4.5x+1)+9-(20.5)=0

We add all the numbers together, and all the variables

5(4.5x+1)-11.5=0

We multiply parentheses

20x+5-11.5=0

We add all the numbers together, and all the variables

20x-6.5=0

We move all terms containing x to the left, all other terms to the right

20x=6.5

x=6.5/20

x=2.6/8

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