-21-8a=5(a+6)

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Solution for -21-8a=5(a+6) equation:


Simplifying
-21 + -8a = 5(a + 6)

Reorder the terms:
-21 + -8a = 5(6 + a)
-21 + -8a = (6 * 5 + a * 5)
-21 + -8a = (30 + 5a)

Solving
-21 + -8a = 30 + 5a

Solving for variable 'a'.

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

Add '-5a' to each side of the equation.
-21 + -8a + -5a = 30 + 5a + -5a

Combine like terms: -8a + -5a = -13a
-21 + -13a = 30 + 5a + -5a

Combine like terms: 5a + -5a = 0
-21 + -13a = 30 + 0
-21 + -13a = 30

Add '21' to each side of the equation.
-21 + 21 + -13a = 30 + 21

Combine like terms: -21 + 21 = 0
0 + -13a = 30 + 21
-13a = 30 + 21

Combine like terms: 30 + 21 = 51
-13a = 51

Divide each side by '-13'.
a = -3.923076923

Simplifying
a = -3.923076923

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