3.4=-13.6+(-3.4*D)+1.7*D

Solution for 3.4=-13.6+(-3.4*D)+1.7*D equation:

Simplifying
3.4 = -13.6 + (-3.4D) + 1.7D

Combine like terms: (-3.4D) + 1.7D = -1.7D
3.4 = -13.6 + -1.7D

Solving
3.4 = -13.6 + -1.7D

Solving for variable 'D'.

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

Add '1.7D' to each side of the equation.
3.4 + 1.7D = -13.6 + -1.7D + 1.7D

Combine like terms: -1.7D + 1.7D = 0.0
3.4 + 1.7D = -13.6 + 0.0
3.4 + 1.7D = -13.6

Add '-3.4' to each side of the equation.
3.4 + -3.4 + 1.7D = -13.6 + -3.4

Combine like terms: 3.4 + -3.4 = 0.0
0.0 + 1.7D = -13.6 + -3.4
1.7D = -13.6 + -3.4

Combine like terms: -13.6 + -3.4 = -17
1.7D = -17

Divide each side by '1.7'.
D = -10

Simplifying
D = -10