2n-4a=9a

Solution for 2n-4a=9a equation:

Simplifying
2n + -4a = 9a

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

Solving
-4a + 2n = 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.
-4a + -9a + 2n = 9a + -9a

Combine like terms: -4a + -9a = -13a
-13a + 2n = 9a + -9a

Combine like terms: 9a + -9a = 0
-13a + 2n = 0

Add '-2n' to each side of the equation.
-13a + 2n + -2n = 0 + -2n

Combine like terms: 2n + -2n = 0
-13a + 0 = 0 + -2n
-13a = 0 + -2n
Remove the zero:
-13a = -2n

Divide each side by '-13'.
a = 0.1538461538n

Simplifying
a = 0.1538461538n