n+.2n+3.9=1.5(n-1)

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Solution for n+.2n+3.9=1.5(n-1) equation:


Simplifying
n + 0.2n + 3.9 = 1.5(n + -1)

Reorder the terms:
3.9 + n + 0.2n = 1.5(n + -1)

Combine like terms: n + 0.2n = 1.2n
3.9 + 1.2n = 1.5(n + -1)

Reorder the terms:
3.9 + 1.2n = 1.5(-1 + n)
3.9 + 1.2n = (-1 * 1.5 + n * 1.5)
3.9 + 1.2n = (-1.5 + 1.5n)

Solving
3.9 + 1.2n = -1.5 + 1.5n

Solving for variable 'n'.

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

Add '-1.5n' to each side of the equation.
3.9 + 1.2n + -1.5n = -1.5 + 1.5n + -1.5n

Combine like terms: 1.2n + -1.5n = -0.3n
3.9 + -0.3n = -1.5 + 1.5n + -1.5n

Combine like terms: 1.5n + -1.5n = 0.0
3.9 + -0.3n = -1.5 + 0.0
3.9 + -0.3n = -1.5

Add '-3.9' to each side of the equation.
3.9 + -3.9 + -0.3n = -1.5 + -3.9

Combine like terms: 3.9 + -3.9 = 0.0
0.0 + -0.3n = -1.5 + -3.9
-0.3n = -1.5 + -3.9

Combine like terms: -1.5 + -3.9 = -5.4
-0.3n = -5.4

Divide each side by '-0.3'.
n = 18

Simplifying
n = 18

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