-21=9a-15-39

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Solution for -21=9a-15-39 equation:


Simplifying
-21 = 9a + -15 + -39

Reorder the terms:
-21 = -15 + -39 + 9a

Combine like terms: -15 + -39 = -54
-21 = -54 + 9a

Solving
-21 = -54 + 9a

Solving for variable 'a'.

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

Add '-9a' to each side of the equation.
-21 + -9a = -54 + 9a + -9a

Combine like terms: 9a + -9a = 0
-21 + -9a = -54 + 0
-21 + -9a = -54

Add '21' to each side of the equation.
-21 + 21 + -9a = -54 + 21

Combine like terms: -21 + 21 = 0
0 + -9a = -54 + 21
-9a = -54 + 21

Combine like terms: -54 + 21 = -33
-9a = -33

Divide each side by '-9'.
a = 3.666666667

Simplifying
a = 3.666666667

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