-4=l-7

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Solution for -4=l-7 equation: 



-4=l-7

We move all terms to the left:

-4-(l-7)=0

We get rid of parentheses

-l+7-4=0

We add all the numbers together, and all the variables

-1l+3=0

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

-l=-3

l=-3/-1

l=+3

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