15=1.5s+0.75(12-s)

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Solution for 15=1.5s+0.75(12-s) equation: 



15=1.5s+0.75(12-s)

We move all terms to the left:

15-(1.5s+0.75(12-s))=0

We add all the numbers together, and all the variables

-(1.5s+0.75(-1s+12))+15=0



We calculate terms in parentheses: -(1.5s+0.75(-1s+12)), so:

1.5s+0.75(-1s+12)

We multiply parentheses

1.5s-0.75s+9

We add all the numbers together, and all the variables

0.75s+9

Back to the equation:

-(0.75s+9)



We get rid of parentheses

-0.75s-9+15=0

We add all the numbers together, and all the variables

-0.75s+6=0

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

-0.75s=-6

s=-6/-0.75

s=+8

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