5a-1=21

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Solution for 5a-1=21 equation: 


Simplifying
5a + -1 = 21

Reorder the terms:
-1 + 5a = 21

Solving
-1 + 5a = 21

Solving for variable 'a'.

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

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

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

Combine like terms: 21 + 1 = 22
5a = 22

Divide each side by '5'.
a = 4.4

Simplifying
a = 4.4

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