-4(1+r)=16

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Solution for -4(1+r)=16 equation: 



-4(1+r)=16

We move all terms to the left:

-4(1+r)-(16)=0

We add all the numbers together, and all the variables

-4(r+1)-16=0

We multiply parentheses

-4r-4-16=0

We add all the numbers together, and all the variables

-4r-20=0

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

-4r=20

r=20/-4

r=-5

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