4d+5=2d+21

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Solution for 4d+5=2d+21 equation:


Simplifying
4d + 5 = 2d + 21

Reorder the terms:
5 + 4d = 2d + 21

Reorder the terms:
5 + 4d = 21 + 2d

Solving
5 + 4d = 21 + 2d

Solving for variable 'd'.

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

Add '-2d' to each side of the equation.
5 + 4d + -2d = 21 + 2d + -2d

Combine like terms: 4d + -2d = 2d
5 + 2d = 21 + 2d + -2d

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

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

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

Combine like terms: 21 + -5 = 16
2d = 16

Divide each side by '2'.
d = 8

Simplifying
d = 8

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