7l+9=4l-15

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Solution for 7l+9=4l-15 equation: 



7l+9=4l-15

We move all terms to the left:

7l+9-(4l-15)=0

We get rid of parentheses

7l-4l+15+9=0

We add all the numbers together, and all the variables

3l+24=0

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

3l=-24

l=-24/3

l=-8

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