7-5(1+3s)=-21

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Solution for 7-5(1+3s)=-21 equation: 



7-5(1+3s)=-21

We move all terms to the left:

7-5(1+3s)-(-21)=0

We add all the numbers together, and all the variables

-5(3s+1)+7-(-21)=0

We add all the numbers together, and all the variables

-5(3s+1)+28=0

We multiply parentheses

-15s-5+28=0

We add all the numbers together, and all the variables

-15s+23=0

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

-15s=-23

s=-23/-15

s=1+8/15

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