S+(9+2s)=129

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Solution for S+(9+2s)=129 equation: 



+(9+2S)=129

We move all terms to the left:

+(9+2S)-(129)=0

We add all the numbers together, and all the variables

(2S+9)-129=0

We get rid of parentheses

2S+9-129=0

We add all the numbers together, and all the variables

2S-120=0

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

2S=120

S=120/2

S=60

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