2d+21=5b+9

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Solution for 2d+21=5b+9 equation:


Simplifying
2d + 21 = 5b + 9

Reorder the terms:
21 + 2d = 5b + 9

Reorder the terms:
21 + 2d = 9 + 5b

Solving
21 + 2d = 9 + 5b

Solving for variable 'd'.

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

Add '-21' to each side of the equation.
21 + -21 + 2d = 9 + -21 + 5b

Combine like terms: 21 + -21 = 0
0 + 2d = 9 + -21 + 5b
2d = 9 + -21 + 5b

Combine like terms: 9 + -21 = -12
2d = -12 + 5b

Divide each side by '2'.
d = -6 + 2.5b

Simplifying
d = -6 + 2.5b

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