9-2a=8a+4

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Solution for 9-2a=8a+4 equation:


Simplifying
9 + -2a = 8a + 4

Reorder the terms:
9 + -2a = 4 + 8a

Solving
9 + -2a = 4 + 8a

Solving for variable 'a'.

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

Add '-8a' to each side of the equation.
9 + -2a + -8a = 4 + 8a + -8a

Combine like terms: -2a + -8a = -10a
9 + -10a = 4 + 8a + -8a

Combine like terms: 8a + -8a = 0
9 + -10a = 4 + 0
9 + -10a = 4

Add '-9' to each side of the equation.
9 + -9 + -10a = 4 + -9

Combine like terms: 9 + -9 = 0
0 + -10a = 4 + -9
-10a = 4 + -9

Combine like terms: 4 + -9 = -5
-10a = -5

Divide each side by '-10'.
a = 0.5

Simplifying
a = 0.5

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