8d+9-10d=13

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Solution for 8d+9-10d=13 equation:


Simplifying
8d + 9 + -10d = 13

Reorder the terms:
9 + 8d + -10d = 13

Combine like terms: 8d + -10d = -2d
9 + -2d = 13

Solving
9 + -2d = 13

Solving for variable 'd'.

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

Add '-9' to each side of the equation.
9 + -9 + -2d = 13 + -9

Combine like terms: 9 + -9 = 0
0 + -2d = 13 + -9
-2d = 13 + -9

Combine like terms: 13 + -9 = 4
-2d = 4

Divide each side by '-2'.
d = -2

Simplifying
d = -2

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