12d+9=19-8d

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Solution for 12d+9=19-8d equation:


Simplifying
12d + 9 = 19 + -8d

Reorder the terms:
9 + 12d = 19 + -8d

Solving
9 + 12d = 19 + -8d

Solving for variable 'd'.

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

Add '8d' to each side of the equation.
9 + 12d + 8d = 19 + -8d + 8d

Combine like terms: 12d + 8d = 20d
9 + 20d = 19 + -8d + 8d

Combine like terms: -8d + 8d = 0
9 + 20d = 19 + 0
9 + 20d = 19

Add '-9' to each side of the equation.
9 + -9 + 20d = 19 + -9

Combine like terms: 9 + -9 = 0
0 + 20d = 19 + -9
20d = 19 + -9

Combine like terms: 19 + -9 = 10
20d = 10

Divide each side by '20'.
d = 0.5

Simplifying
d = 0.5

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