d=3d+2.1

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Solution for d=3d+2.1 equation: 


Simplifying
d = 3d + 2.1

Reorder the terms:
d = 2.1 + 3d

Solving
d = 2.1 + 3d

Solving for variable 'd'.

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

Add '-3d' to each side of the equation.
d + -3d = 2.1 + 3d + -3d

Combine like terms: d + -3d = -2d
-2d = 2.1 + 3d + -3d

Combine like terms: 3d + -3d = 0
-2d = 2.1 + 0
-2d = 2.1

Divide each side by '-2'.
d = -1.05

Simplifying
d = -1.05

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