12d+19-10d-20=

Solution for 12d+19-10d-20= equation:

Simplifying
12d + 19 + -10d + -20 = 0

Reorder the terms:
19 + -20 + 12d + -10d = 0

Combine like terms: 19 + -20 = -1
-1 + 12d + -10d = 0

Combine like terms: 12d + -10d = 2d
-1 + 2d = 0

Solving
-1 + 2d = 0

Solving for variable 'd'.

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

Add '1' to each side of the equation.
-1 + 1 + 2d = 0 + 1

Combine like terms: -1 + 1 = 0
0 + 2d = 0 + 1
2d = 0 + 1

Combine like terms: 0 + 1 = 1
2d = 1

Divide each side by '2'.
d = 0.5

Simplifying
d = 0.5