3+9d-20=20d+40-30d

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Solution for 3+9d-20=20d+40-30d equation:


Simplifying
3 + 9d + -20 = 20d + 40 + -30d

Reorder the terms:
3 + -20 + 9d = 20d + 40 + -30d

Combine like terms: 3 + -20 = -17
-17 + 9d = 20d + 40 + -30d

Reorder the terms:
-17 + 9d = 40 + 20d + -30d

Combine like terms: 20d + -30d = -10d
-17 + 9d = 40 + -10d

Solving
-17 + 9d = 40 + -10d

Solving for variable 'd'.

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

Add '10d' to each side of the equation.
-17 + 9d + 10d = 40 + -10d + 10d

Combine like terms: 9d + 10d = 19d
-17 + 19d = 40 + -10d + 10d

Combine like terms: -10d + 10d = 0
-17 + 19d = 40 + 0
-17 + 19d = 40

Add '17' to each side of the equation.
-17 + 17 + 19d = 40 + 17

Combine like terms: -17 + 17 = 0
0 + 19d = 40 + 17
19d = 40 + 17

Combine like terms: 40 + 17 = 57
19d = 57

Divide each side by '19'.
d = 3

Simplifying
d = 3

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