(a+3)-6=21

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Solution for (a+3)-6=21 equation:


Simplifying
(a + 3) + -6 = 21

Reorder the terms:
(3 + a) + -6 = 21

Remove parenthesis around (3 + a)
3 + a + -6 = 21

Reorder the terms:
3 + -6 + a = 21

Combine like terms: 3 + -6 = -3
-3 + a = 21

Solving
-3 + a = 21

Solving for variable 'a'.

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

Add '3' to each side of the equation.
-3 + 3 + a = 21 + 3

Combine like terms: -3 + 3 = 0
0 + a = 21 + 3
a = 21 + 3

Combine like terms: 21 + 3 = 24
a = 24

Simplifying
a = 24

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