7+21ln=4

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Solution for 7+21ln=4 equation: 


Simplifying
7 + 21ln = 4

Solving
7 + 21ln = 4

Solving for variable 'l'.

Move all terms containing l to the left, all other terms to the right.

Add '-7' to each side of the equation.
7 + -7 + 21ln = 4 + -7

Combine like terms: 7 + -7 = 0
0 + 21ln = 4 + -7
21ln = 4 + -7

Combine like terms: 4 + -7 = -3
21ln = -3

Divide each side by '21n'.
l = -0.1428571429n-1

Simplifying
l = -0.1428571429n-1

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