2(d-5)=21

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Solution for 2(d-5)=21 equation: 


Simplifying
2(d + -5) = 21

Reorder the terms:
2(-5 + d) = 21
(-5 * 2 + d * 2) = 21
(-10 + 2d) = 21

Solving
-10 + 2d = 21

Solving for variable 'd'.

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

Add '10' to each side of the equation.
-10 + 10 + 2d = 21 + 10

Combine like terms: -10 + 10 = 0
0 + 2d = 21 + 10
2d = 21 + 10

Combine like terms: 21 + 10 = 31
2d = 31

Divide each side by '2'.
d = 15.5

Simplifying
d = 15.5

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