2a-1=9a

Solution for 2a-1=9a equation:

Simplifying
2a + -1 = 9a

Reorder the terms:
-1 + 2a = 9a

Solving
-1 + 2a = 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.
-1 + 2a + -9a = 9a + -9a

Combine like terms: 2a + -9a = -7a
-1 + -7a = 9a + -9a

Combine like terms: 9a + -9a = 0
-1 + -7a = 0

Add '1' to each side of the equation.
-1 + 1 + -7a = 0 + 1

Combine like terms: -1 + 1 = 0
0 + -7a = 0 + 1
-7a = 0 + 1

Combine like terms: 0 + 1 = 1
-7a = 1

Divide each side by '-7'.
a = -0.1428571429

Simplifying
a = -0.1428571429