3x^2+9ax=21a

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Solution for 3x^2+9ax=21a equation:


Simplifying
3x2 + 9ax = 21a

Reorder the terms:
9ax + 3x2 = 21a

Solving
9ax + 3x2 = 21a

Solving for variable 'a'.

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

Add '-21a' to each side of the equation.
9ax + -21a + 3x2 = 21a + -21a

Reorder the terms:
-21a + 9ax + 3x2 = 21a + -21a

Combine like terms: 21a + -21a = 0
-21a + 9ax + 3x2 = 0

Add '-3x2' to each side of the equation.
-21a + 9ax + 3x2 + -3x2 = 0 + -3x2

Combine like terms: 3x2 + -3x2 = 0
-21a + 9ax + 0 = 0 + -3x2
-21a + 9ax = 0 + -3x2
Remove the zero:
-21a + 9ax = -3x2

Combine like terms: -3x2 + 3x2 = 0
-21a + 9ax + 3x2 = 0

Factor out the Greatest Common Factor (GCF), '3'.
3(-7a + 3ax + x2) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(-7a + 3ax + x2)' equal to zero and attempt to solve: Simplifying -7a + 3ax + x2 = 0 Solving -7a + 3ax + x2 = 0 Move all terms containing a to the left, all other terms to the right. Add '-1x2' to each side of the equation. -7a + 3ax + x2 + -1x2 = 0 + -1x2 Combine like terms: x2 + -1x2 = 0 -7a + 3ax + 0 = 0 + -1x2 -7a + 3ax = 0 + -1x2 Remove the zero: -7a + 3ax = -1x2 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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