d+3.5=3.9

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Solution for d+3.5=3.9 equation: 


Simplifying
d + 3.5 = 3.9

Reorder the terms:
3.5 + d = 3.9

Solving
3.5 + d = 3.9

Solving for variable 'd'.

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

Add '-3.5' to each side of the equation.
3.5 + -3.5 + d = 3.9 + -3.5

Combine like terms: 3.5 + -3.5 = 0.0
0.0 + d = 3.9 + -3.5
d = 3.9 + -3.5

Combine like terms: 3.9 + -3.5 = 0.4
d = 0.4

Simplifying
d = 0.4

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