8a-11=21

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Solution for 8a-11=21 equation: 


Simplifying
8a + -11 = 21

Reorder the terms:
-11 + 8a = 21

Solving
-11 + 8a = 21

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 + 8a = 21 + 11

Combine like terms: -11 + 11 = 0
0 + 8a = 21 + 11
8a = 21 + 11

Combine like terms: 21 + 11 = 32
8a = 32

Divide each side by '8'.
a = 4

Simplifying
a = 4

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