4x+9=109-x

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Solution for 4x+9=109-x equation: 



4x+9=109-x

We move all terms to the left:

4x+9-(109-x)=0

We add all the numbers together, and all the variables

4x-(-1x+109)+9=0

We get rid of parentheses

4x+1x-109+9=0

We add all the numbers together, and all the variables

5x-100=0

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

5x=100

x=100/5

x=20

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