4a+5b-9a+8b=

Solution for 4a+5b-9a+8b= equation:

Simplifying
4a + 5b + -9a + 8b = 0

Reorder the terms:
4a + -9a + 5b + 8b = 0

Combine like terms: 4a + -9a = -5a
-5a + 5b + 8b = 0

Combine like terms: 5b + 8b = 13b
-5a + 13b = 0

Solving
-5a + 13b = 0

Solving for variable 'a'.

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

Add '-13b' to each side of the equation.
-5a + 13b + -13b = 0 + -13b

Combine like terms: 13b + -13b = 0
-5a + 0 = 0 + -13b
-5a = 0 + -13b
Remove the zero:
-5a = -13b

Divide each side by '-5'.
a = 2.6b

Simplifying
a = 2.6b