-21=9a-15-3ao

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Solution for -21=9a-15-3ao equation:


Simplifying
-21 = 9a + -15 + -3ao

Reorder the terms:
-21 = -15 + 9a + -3ao

Solving
-21 = -15 + 9a + -3ao

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 = -15 + 9a + -9a + -3ao

Combine like terms: 9a + -9a = 0
-21 + -9a = -15 + 0 + -3ao
-21 + -9a = -15 + -3ao

Add '3ao' to each side of the equation.
-21 + -9a + 3ao = -15 + -3ao + 3ao

Combine like terms: -3ao + 3ao = 0
-21 + -9a + 3ao = -15 + 0
-21 + -9a + 3ao = -15

Add '21' to each side of the equation.
-21 + -9a + 21 + 3ao = -15 + 21

Reorder the terms:
-21 + 21 + -9a + 3ao = -15 + 21

Combine like terms: -21 + 21 = 0
0 + -9a + 3ao = -15 + 21
-9a + 3ao = -15 + 21

Combine like terms: -15 + 21 = 6
-9a + 3ao = 6

Reorder the terms:
-6 + -9a + 3ao = 6 + -6

Combine like terms: 6 + -6 = 0
-6 + -9a + 3ao = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(-2 + -3a + ao) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(-2 + -3a + ao)' equal to zero and attempt to solve: Simplifying -2 + -3a + ao = 0 Solving -2 + -3a + ao = 0 Move all terms containing a to the left, all other terms to the right. Add '2' to each side of the equation. -2 + -3a + 2 + ao = 0 + 2 Reorder the terms: -2 + 2 + -3a + ao = 0 + 2 Combine like terms: -2 + 2 = 0 0 + -3a + ao = 0 + 2 -3a + ao = 0 + 2 Combine like terms: 0 + 2 = 2 -3a + ao = 2 The solution to this equation could not be determined. This subproblem is being ignored because a solution could not be determined. The solution to this equation could not be determined.

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