S(x)=12-0.25xx=-4

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Solution for S(x)=12-0.25xx=-4 equation: 



(S)=12-0.25SS=-4

We move all terms to the left:

(S)-(12-0.25SS)=0

We add all the numbers together, and all the variables

S-(-0.25SS+12)=0

We get rid of parentheses

S+0.25SS-12=0

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

S+0.25SS=12

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