L3(7r-7)=-6+6r

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Solution for L3(7r-7)=-6+6r equation: 



3(7L-7)=-6+6L

We move all terms to the left:

3(7L-7)-(-6+6L)=0

We add all the numbers together, and all the variables

3(7L-7)-(6L-6)=0

We multiply parentheses

21L-(6L-6)-21=0

We get rid of parentheses

21L-6L+6-21=0

We add all the numbers together, and all the variables

15L-15=0

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

15L=15

L=15/15

L=1

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