5+-10a+9a+-1=

Solution for 5+-10a+9a+-1= equation:

Simplifying
5 + -10a + 9a + -1 = 0

Reorder the terms:
5 + -1 + -10a + 9a = 0

Combine like terms: 5 + -1 = 4
4 + -10a + 9a = 0

Combine like terms: -10a + 9a = -1a
4 + -1a = 0

Solving
4 + -1a = 0

Solving for variable 'a'.

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

Add '-4' to each side of the equation.
4 + -4 + -1a = 0 + -4

Combine like terms: 4 + -4 = 0
0 + -1a = 0 + -4
-1a = 0 + -4

Combine like terms: 0 + -4 = -4
-1a = -4

Divide each side by '-1'.
a = 4

Simplifying
a = 4