7d-9=-170

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Solution for 7d-9=-170 equation: 


Simplifying
7d + -9 = -170

Reorder the terms:
-9 + 7d = -170

Solving
-9 + 7d = -170

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 + 7d = -170 + 9

Combine like terms: -9 + 9 = 0
0 + 7d = -170 + 9
7d = -170 + 9

Combine like terms: -170 + 9 = -161
7d = -161

Divide each side by '7'.
d = -23

Simplifying
d = -23

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