d=3(x+7)

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Solution for d=3(x+7) equation: 


Simplifying
d = 3(x + 7)

Reorder the terms:
d = 3(7 + x)
d = (7 * 3 + x * 3)
d = (21 + 3x)

Solving
d = 21 + 3x

Solving for variable 'd'.

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

Simplifying
d = 21 + 3x

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