-3a+4+9a=8a-4a

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Solution for -3a+4+9a=8a-4a equation:


Simplifying
-3a + 4 + 9a = 8a + -4a

Reorder the terms:
4 + -3a + 9a = 8a + -4a

Combine like terms: -3a + 9a = 6a
4 + 6a = 8a + -4a

Combine like terms: 8a + -4a = 4a
4 + 6a = 4a

Solving
4 + 6a = 4a

Solving for variable 'a'.

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

Add '-4a' to each side of the equation.
4 + 6a + -4a = 4a + -4a

Combine like terms: 6a + -4a = 2a
4 + 2a = 4a + -4a

Combine like terms: 4a + -4a = 0
4 + 2a = 0

Add '-4' to each side of the equation.
4 + -4 + 2a = 0 + -4

Combine like terms: 4 + -4 = 0
0 + 2a = 0 + -4
2a = 0 + -4

Combine like terms: 0 + -4 = -4
2a = -4

Divide each side by '2'.
a = -2

Simplifying
a = -2

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