-9a-55=-4d

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Solution for -9a-55=-4d equation: 


Simplifying
-9a + -55 = -4d

Reorder the terms:
-55 + -9a = -4d

Solving
-55 + -9a = -4d

Solving for variable 'a'.

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

Add '55' to each side of the equation.
-55 + 55 + -9a = 55 + -4d

Combine like terms: -55 + 55 = 0
0 + -9a = 55 + -4d
-9a = 55 + -4d

Divide each side by '-9'.
a = -6.111111111 + 0.4444444444d

Simplifying
a = -6.111111111 + 0.4444444444d

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