-6a-15=-21

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Solution for -6a-15=-21 equation: 


Simplifying
-6a + -15 = -21

Reorder the terms:
-15 + -6a = -21

Solving
-15 + -6a = -21

Solving for variable 'a'.

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

Add '15' to each side of the equation.
-15 + 15 + -6a = -21 + 15

Combine like terms: -15 + 15 = 0
0 + -6a = -21 + 15
-6a = -21 + 15

Combine like terms: -21 + 15 = -6
-6a = -6

Divide each side by '-6'.
a = 1

Simplifying
a = 1

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