1+8d+d-12=17+8

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Solution for 1+8d+d-12=17+8 equation:


Simplifying
1 + 8d + d + -12 = 17 + 8

Reorder the terms:
1 + -12 + 8d + d = 17 + 8

Combine like terms: 1 + -12 = -11
-11 + 8d + d = 17 + 8

Combine like terms: 8d + d = 9d
-11 + 9d = 17 + 8

Combine like terms: 17 + 8 = 25
-11 + 9d = 25

Solving
-11 + 9d = 25

Solving for variable 'd'.

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

Add '11' to each side of the equation.
-11 + 11 + 9d = 25 + 11

Combine like terms: -11 + 11 = 0
0 + 9d = 25 + 11
9d = 25 + 11

Combine like terms: 25 + 11 = 36
9d = 36

Divide each side by '9'.
d = 4

Simplifying
d = 4

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