25=-2.2+(n-1)*1.6

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Solution for 25=-2.2+(n-1)*1.6 equation: 


Simplifying
25 = -2.2 + (n + -1) * 1.6

Reorder the terms:
25 = -2.2 + (-1 + n) * 1.6

Reorder the terms for easier multiplication:
25 = -2.2 + 1.6(-1 + n)
25 = -2.2 + (-1 * 1.6 + n * 1.6)
25 = -2.2 + (-1.6 + 1.6n)

Combine like terms: -2.2 + -1.6 = -3.8
25 = -3.8 + 1.6n

Solving
25 = -3.8 + 1.6n

Solving for variable 'n'.

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

Add '-1.6n' to each side of the equation.
25 + -1.6n = -3.8 + 1.6n + -1.6n

Combine like terms: 1.6n + -1.6n = 0.0
25 + -1.6n = -3.8 + 0.0
25 + -1.6n = -3.8

Add '-25' to each side of the equation.
25 + -25 + -1.6n = -3.8 + -25

Combine like terms: 25 + -25 = 0
0 + -1.6n = -3.8 + -25
-1.6n = -3.8 + -25

Combine like terms: -3.8 + -25 = -28.8
-1.6n = -28.8

Divide each side by '-1.6'.
n = 18

Simplifying
n = 18

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