a+11=20

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Solution for a+11=20 equation: 


Simplifying
a + 11 = 20

Reorder the terms:
11 + a = 20

Solving
11 + a = 20

Solving for variable 'a'.

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

Add '-11' to each side of the equation.
11 + -11 + a = 20 + -11

Combine like terms: 11 + -11 = 0
0 + a = 20 + -11
a = 20 + -11

Combine like terms: 20 + -11 = 9
a = 9

Simplifying
a = 9

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