.4d+6=42

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Solution for .4d+6=42 equation: 


Simplifying
0.4d + 6 = 42

Reorder the terms:
6 + 0.4d = 42

Solving
6 + 0.4d = 42

Solving for variable 'd'.

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

Add '-6' to each side of the equation.
6 + -6 + 0.4d = 42 + -6

Combine like terms: 6 + -6 = 0
0 + 0.4d = 42 + -6
0.4d = 42 + -6

Combine like terms: 42 + -6 = 36
0.4d = 36

Divide each side by '0.4'.
d = 90

Simplifying
d = 90

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