0=70+(n-1)(-10.2)

Solution for 0=70+(n-1)(-10.2) equation:

Simplifying
0 = 70 + (n + -1)(-10.2)

Reorder the terms:
0 = 70 + (-1 + n)(-10.2)

Reorder the terms for easier multiplication:
0 = 70 + -10.2(-1 + n)
0 = 70 + (-1 * -10.2 + n * -10.2)
0 = 70 + (10.2 + -10.2n)

Combine like terms: 70 + 10.2 = 80.2
0 = 80.2 + -10.2n

Solving
0 = 80.2 + -10.2n

Solving for variable 'n'.

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

Add '10.2n' to each side of the equation.
0 + 10.2n = 80.2 + -10.2n + 10.2n
Remove the zero:
10.2n = 80.2 + -10.2n + 10.2n

Combine like terms: -10.2n + 10.2n = 0.0
10.2n = 80.2 + 0.0
10.2n = 80.2

Divide each side by '10.2'.
n = 7.862745098

Simplifying
n = 7.862745098