12+-9=8-4n

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Solution for 12+-9=8-4n equation:


Simplifying
12 + -9 = 8 + -4n

Combine like terms: 12 + -9 = 3
3 = 8 + -4n

Solving
3 = 8 + -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.
3 + 4n = 8 + -4n + 4n

Combine like terms: -4n + 4n = 0
3 + 4n = 8 + 0
3 + 4n = 8

Add '-3' to each side of the equation.
3 + -3 + 4n = 8 + -3

Combine like terms: 3 + -3 = 0
0 + 4n = 8 + -3
4n = 8 + -3

Combine like terms: 8 + -3 = 5
4n = 5

Divide each side by '4'.
n = 1.25

Simplifying
n = 1.25

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