3d=42-4d

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Solution for 3d=42-4d equation: 


Simplifying
3d = 42 + -4d

Solving
3d = 42 + -4d

Solving for variable 'd'.

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

Add '4d' to each side of the equation.
3d + 4d = 42 + -4d + 4d

Combine like terms: 3d + 4d = 7d
7d = 42 + -4d + 4d

Combine like terms: -4d + 4d = 0
7d = 42 + 0
7d = 42

Divide each side by '7'.
d = 6

Simplifying
d = 6

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