21+a=29

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Solution for 21+a=29 equation: 


Simplifying
21 + a = 29

Solving
21 + a = 29

Solving for variable 'a'.

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

Add '-21' to each side of the equation.
21 + -21 + a = 29 + -21

Combine like terms: 21 + -21 = 0
0 + a = 29 + -21
a = 29 + -21

Combine like terms: 29 + -21 = 8
a = 8

Simplifying
a = 8

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