21(r+6)=987

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Solution for 21(r+6)=987 equation: 



21(r+6)=987

We move all terms to the left:

21(r+6)-(987)=0

We multiply parentheses

21r+126-987=0

We add all the numbers together, and all the variables

21r-861=0

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

21r=861

r=861/21

r=41

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