3d-.4=11

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Solution for 3d-.4=11 equation: 


Simplifying
3d + -0.4 = 11

Reorder the terms:
-0.4 + 3d = 11

Solving
-0.4 + 3d = 11

Solving for variable 'd'.

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

Add '0.4' to each side of the equation.
-0.4 + 0.4 + 3d = 11 + 0.4

Combine like terms: -0.4 + 0.4 = 0.0
0.0 + 3d = 11 + 0.4
3d = 11 + 0.4

Combine like terms: 11 + 0.4 = 11.4
3d = 11.4

Divide each side by '3'.
d = 3.8

Simplifying
d = 3.8

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