100-13s=8(10-s)

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Solution for 100-13s=8(10-s) equation: 



100-13s=8(10-s)

We move all terms to the left:

100-13s-(8(10-s))=0

We add all the numbers together, and all the variables

-13s-(8(-1s+10))+100=0



We calculate terms in parentheses: -(8(-1s+10)), so:

8(-1s+10)

We multiply parentheses

-8s+80

Back to the equation:

-(-8s+80)



We get rid of parentheses

-13s+8s-80+100=0

We add all the numbers together, and all the variables

-5s+20=0

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

-5s=-20

s=-20/-5

s=+4

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