s+21=6s-4

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Solution for s+21=6s-4 equation: 



s+21=6s-4

We move all terms to the left:

s+21-(6s-4)=0

We get rid of parentheses

s-6s+4+21=0

We add all the numbers together, and all the variables

-5s+25=0

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

-5s=-25

s=-25/-5

s=+5

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