19.6=3.6+(12-1)d

Solution for 19.6=3.6+(12-1)d equation:

Simplifying
19.6 = 3.6 + (12 + -1) * d

Combine like terms: 12 + -1 = 11
19.6 = 3.6 + (11) * d

Solving
19.6 = 3.6 + 11d

Solving for variable 'd'.

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

Add '-11d' to each side of the equation.
19.6 + -11d = 3.6 + 11d + -11d

Combine like terms: 11d + -11d = 0
19.6 + -11d = 3.6 + 0
19.6 + -11d = 3.6

Add '-19.6' to each side of the equation.
19.6 + -19.6 + -11d = 3.6 + -19.6

Combine like terms: 19.6 + -19.6 = 0.0
0.0 + -11d = 3.6 + -19.6
-11d = 3.6 + -19.6

Combine like terms: 3.6 + -19.6 = -16
-11d = -16

Divide each side by '-11'.
d = 1.454545455

Simplifying
d = 1.454545455