7(5-s)=21

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Solution for 7(5-s)=21 equation: 



7(5-s)=21

We move all terms to the left:

7(5-s)-(21)=0

We add all the numbers together, and all the variables

7(-1s+5)-21=0

We multiply parentheses

-7s+35-21=0

We add all the numbers together, and all the variables

-7s+14=0

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

-7s=-14

s=-14/-7

s=+2

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