-4(1-5s)=21

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Solution for -4(1-5s)=21 equation: 



-4(1-5s)=21

We move all terms to the left:

-4(1-5s)-(21)=0

We add all the numbers together, and all the variables

-4(-5s+1)-21=0

We multiply parentheses

20s-4-21=0

We add all the numbers together, and all the variables

20s-25=0

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

20s=25

s=25/20

s=1+1/4

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