21=2*4a+2

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Solution for 21=2*4a+2 equation:


Simplifying
21 = 2 * 4a + 2

Multiply 2 * 4
21 = 8a + 2

Reorder the terms:
21 = 2 + 8a

Solving
21 = 2 + 8a

Solving for variable 'a'.

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

Add '-8a' to each side of the equation.
21 + -8a = 2 + 8a + -8a

Combine like terms: 8a + -8a = 0
21 + -8a = 2 + 0
21 + -8a = 2

Add '-21' to each side of the equation.
21 + -21 + -8a = 2 + -21

Combine like terms: 21 + -21 = 0
0 + -8a = 2 + -21
-8a = 2 + -21

Combine like terms: 2 + -21 = -19
-8a = -19

Divide each side by '-8'.
a = 2.375

Simplifying
a = 2.375

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