-.3(n-1)=-2.8(n+15)

Solution for -.3(n-1)=-2.8(n+15) equation:

Simplifying
-0.3(n + -1) = -2.8(n + 15)

Reorder the terms:
-0.3(-1 + n) = -2.8(n + 15)
(-1 * -0.3 + n * -0.3) = -2.8(n + 15)
(0.3 + -0.3n) = -2.8(n + 15)

Reorder the terms:
0.3 + -0.3n = -2.8(15 + n)
0.3 + -0.3n = (15 * -2.8 + n * -2.8)
0.3 + -0.3n = (-42 + -2.8n)

Solving
0.3 + -0.3n = -42 + -2.8n

Solving for variable 'n'.

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

Add '2.8n' to each side of the equation.
0.3 + -0.3n + 2.8n = -42 + -2.8n + 2.8n

Combine like terms: -0.3n + 2.8n = 2.5n
0.3 + 2.5n = -42 + -2.8n + 2.8n

Combine like terms: -2.8n + 2.8n = 0.0
0.3 + 2.5n = -42 + 0.0
0.3 + 2.5n = -42

Add '-0.3' to each side of the equation.
0.3 + -0.3 + 2.5n = -42 + -0.3

Combine like terms: 0.3 + -0.3 = 0.0
0.0 + 2.5n = -42 + -0.3
2.5n = -42 + -0.3

Combine like terms: -42 + -0.3 = -42.3
2.5n = -42.3

Divide each side by '2.5'.
n = -16.92

Simplifying
n = -16.92