-0.2d-1=12

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Solution for -0.2d-1=12 equation: 


Simplifying
-0.2d + -1 = 12

Reorder the terms:
-1 + -0.2d = 12

Solving
-1 + -0.2d = 12

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 + -0.2d = 12 + 1

Combine like terms: -1 + 1 = 0
0 + -0.2d = 12 + 1
-0.2d = 12 + 1

Combine like terms: 12 + 1 = 13
-0.2d = 13

Divide each side by '-0.2'.
d = -65

Simplifying
d = -65

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