-4(1+5r)=-21-3r

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Solution for -4(1+5r)=-21-3r equation: 



-4(1+5r)=-21-3r

We move all terms to the left:

-4(1+5r)-(-21-3r)=0

We add all the numbers together, and all the variables

-4(5r+1)-(-3r-21)=0

We multiply parentheses

-20r-(-3r-21)-4=0

We get rid of parentheses

-20r+3r+21-4=0

We add all the numbers together, and all the variables

-17r+17=0

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

-17r=-17

r=-17/-17

r=1

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