7+12=2.5n-2

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Solution for 7+12=2.5n-2 equation:


Simplifying
7 + 12 = 2.5n + -2

Combine like terms: 7 + 12 = 19
19 = 2.5n + -2

Reorder the terms:
19 = -2 + 2.5n

Solving
19 = -2 + 2.5n

Solving for variable 'n'.

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

Add '-2.5n' to each side of the equation.
19 + -2.5n = -2 + 2.5n + -2.5n

Combine like terms: 2.5n + -2.5n = 0.0
19 + -2.5n = -2 + 0.0
19 + -2.5n = -2

Add '-19' to each side of the equation.
19 + -19 + -2.5n = -2 + -19

Combine like terms: 19 + -19 = 0
0 + -2.5n = -2 + -19
-2.5n = -2 + -19

Combine like terms: -2 + -19 = -21
-2.5n = -21

Divide each side by '-2.5'.
n = 8.4

Simplifying
n = 8.4

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