.5n=4n-21

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Solution for .5n=4n-21 equation: 


Simplifying
0.5n = 4n + -21

Reorder the terms:
0.5n = -21 + 4n

Solving
0.5n = -21 + 4n

Solving for variable 'n'.

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

Add '-4n' to each side of the equation.
0.5n + -4n = -21 + 4n + -4n

Combine like terms: 0.5n + -4n = -3.5n
-3.5n = -21 + 4n + -4n

Combine like terms: 4n + -4n = 0
-3.5n = -21 + 0
-3.5n = -21

Divide each side by '-3.5'.
n = 6

Simplifying
n = 6

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