5(1+4r)=105

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Solution for 5(1+4r)=105 equation: 



5(1+4r)=105

We move all terms to the left:

5(1+4r)-(105)=0

We add all the numbers together, and all the variables

5(4r+1)-105=0

We multiply parentheses

20r+5-105=0

We add all the numbers together, and all the variables

20r-100=0

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

20r=100

r=100/20

r=5

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