3.9-d=1.2

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Solution for 3.9-d=1.2 equation: 


Simplifying
3.9 + -1d = 1.2

Solving
3.9 + -1d = 1.2

Solving for variable 'd'.

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

Add '-3.9' to each side of the equation.
3.9 + -3.9 + -1d = 1.2 + -3.9

Combine like terms: 3.9 + -3.9 = 0.0
0.0 + -1d = 1.2 + -3.9
-1d = 1.2 + -3.9

Combine like terms: 1.2 + -3.9 = -2.7
-1d = -2.7

Divide each side by '-1'.
d = 2.7

Simplifying
d = 2.7

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