21=-5+a

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Solution for 21=-5+a equation:


Simplifying
21 = -5 + a

Solving
21 = -5 + a

Solving for variable 'a'.

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

Add '-1a' to each side of the equation.
21 + -1a = -5 + a + -1a

Combine like terms: a + -1a = 0
21 + -1a = -5 + 0
21 + -1a = -5

Add '-21' to each side of the equation.
21 + -21 + -1a = -5 + -21

Combine like terms: 21 + -21 = 0
0 + -1a = -5 + -21
-1a = -5 + -21

Combine like terms: -5 + -21 = -26
-1a = -26

Divide each side by '-1'.
a = 26

Simplifying
a = 26

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