100-5s=10(7+s)

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Solution for 100-5s=10(7+s) equation: 



100-5s=10(7+s)

We move all terms to the left:

100-5s-(10(7+s))=0

We add all the numbers together, and all the variables

-5s-(10(s+7))+100=0



We calculate terms in parentheses: -(10(s+7)), so:

10(s+7)

We multiply parentheses

10s+70

Back to the equation:

-(10s+70)



We get rid of parentheses

-5s-10s-70+100=0

We add all the numbers together, and all the variables

-15s+30=0

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

-15s=-30

s=-30/-15

s=+2

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