Lx-21=7

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Solution for Lx-21=7 equation: 


Simplifying
Lx + -21 = 7

Reorder the terms:
-21 + xL = 7

Solving
-21 + xL = 7

Solving for variable 'x'.

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

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

Combine like terms: -21 + 21 = 0
0 + xL = 7 + 21
xL = 7 + 21

Combine like terms: 7 + 21 = 28
xL = 28

Divide each side by 'L'.
x = 28L-1

Simplifying
x = 28L-1

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