l-7=l+15

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Solution for l-7=l+15 equation: 


Simplifying
l + -7 = l + 15

Reorder the terms:
-7 + l = l + 15

Reorder the terms:
-7 + l = 15 + l

Add '-1l' to each side of the equation.
-7 + l + -1l = 15 + l + -1l

Combine like terms: l + -1l = 0
-7 + 0 = 15 + l + -1l
-7 = 15 + l + -1l

Combine like terms: l + -1l = 0
-7 = 15 + 0
-7 = 15

Solving
-7 = 15

Couldn't find a variable to solve for.

This equation is invalid, the left and right sides are not equal, therefore there is no solution.

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