-4d+9-8.5=28.5

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Solution for -4d+9-8.5=28.5 equation: 


Simplifying
-4d + 9 + -8.5 = 28.5

Reorder the terms:
9 + -8.5 + -4d = 28.5

Combine like terms: 9 + -8.5 = 0.5
0.5 + -4d = 28.5

Solving
0.5 + -4d = 28.5

Solving for variable 'd'.

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

Add '-0.5' to each side of the equation.
0.5 + -0.5 + -4d = 28.5 + -0.5

Combine like terms: 0.5 + -0.5 = 0.0
0.0 + -4d = 28.5 + -0.5
-4d = 28.5 + -0.5

Combine like terms: 28.5 + -0.5 = 28
-4d = 28

Divide each side by '-4'.
d = -7

Simplifying
d = -7

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