21=(4a+2)

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Solution for 21=(4a+2) equation:


Simplifying
21 = (4a + 2)

Reorder the terms:
21 = (2 + 4a)

Remove parenthesis around (2 + 4a)
21 = 2 + 4a

Solving
21 = 2 + 4a

Solving for variable 'a'.

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

Add '-4a' to each side of the equation.
21 + -4a = 2 + 4a + -4a

Combine like terms: 4a + -4a = 0
21 + -4a = 2 + 0
21 + -4a = 2

Add '-21' to each side of the equation.
21 + -21 + -4a = 2 + -21

Combine like terms: 21 + -21 = 0
0 + -4a = 2 + -21
-4a = 2 + -21

Combine like terms: 2 + -21 = -19
-4a = -19

Divide each side by '-4'.
a = 4.75

Simplifying
a = 4.75

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