(31.2-7n)-.3=0.456

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Solution for (31.2-7n)-.3=0.456 equation: 


Simplifying
(31.2 + -7n) + -0.3 = 0.456

Remove parenthesis around (31.2 + -7n)
31.2 + -7n + -0.3 = 0.456

Reorder the terms:
31.2 + -0.3 + -7n = 0.456

Combine like terms: 31.2 + -0.3 = 30.9
30.9 + -7n = 0.456

Solving
30.9 + -7n = 0.456

Solving for variable 'n'.

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

Add '-30.9' to each side of the equation.
30.9 + -30.9 + -7n = 0.456 + -30.9

Combine like terms: 30.9 + -30.9 = 0.0
0.0 + -7n = 0.456 + -30.9
-7n = 0.456 + -30.9

Combine like terms: 0.456 + -30.9 = -30.444
-7n = -30.444

Divide each side by '-7'.
n = 4.349142857

Simplifying
n = 4.349142857

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