20-7d=55

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Solution for 20-7d=55 equation: 


Simplifying
20 + -7d = 55

Solving
20 + -7d = 55

Solving for variable 'd'.

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

Add '-20' to each side of the equation.
20 + -20 + -7d = 55 + -20

Combine like terms: 20 + -20 = 0
0 + -7d = 55 + -20
-7d = 55 + -20

Combine like terms: 55 + -20 = 35
-7d = 35

Divide each side by '-7'.
d = -5

Simplifying
d = -5

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