9+11=-5A+21

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Solution for 9+11=-5A+21 equation: 


Simplifying
9 + 11 = -5A + 21

Combine like terms: 9 + 11 = 20
20 = -5A + 21

Reorder the terms:
20 = 21 + -5A

Solving
20 = 21 + -5A

Solving for variable 'A'.

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

Add '5A' to each side of the equation.
20 + 5A = 21 + -5A + 5A

Combine like terms: -5A + 5A = 0
20 + 5A = 21 + 0
20 + 5A = 21

Add '-20' to each side of the equation.
20 + -20 + 5A = 21 + -20

Combine like terms: 20 + -20 = 0
0 + 5A = 21 + -20
5A = 21 + -20

Combine like terms: 21 + -20 = 1
5A = 1

Divide each side by '5'.
A = 0.2

Simplifying
A = 0.2

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