4(1-3r)=100

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Solution for 4(1-3r)=100 equation: 



4(1-3r)=100

We move all terms to the left:

4(1-3r)-(100)=0

We add all the numbers together, and all the variables

4(-3r+1)-100=0

We multiply parentheses

-12r+4-100=0

We add all the numbers together, and all the variables

-12r-96=0

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

-12r=96

r=96/-12

r=-8

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