(2.5a+1.6b)+(3.4a+4b)=

Solution for (2.5a+1.6b)+(3.4a+4b)= equation:

Simplifying
(2.5a + 1.6b) + (3.4a + 4b) = 0

Remove parenthesis around (2.5a + 1.6b)
2.5a + 1.6b + (3.4a + 4b) = 0

Remove parenthesis around (3.4a + 4b)
2.5a + 1.6b + 3.4a + 4b = 0

Reorder the terms:
2.5a + 3.4a + 1.6b + 4b = 0

Combine like terms: 2.5a + 3.4a = 5.9a
5.9a + 1.6b + 4b = 0

Combine like terms: 1.6b + 4b = 5.6b
5.9a + 5.6b = 0

Solving
5.9a + 5.6b = 0

Solving for variable 'a'.

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

Add '-5.6b' to each side of the equation.
5.9a + 5.6b + -5.6b = 0 + -5.6b

Combine like terms: 5.6b + -5.6b = 0.0
5.9a + 0.0 = 0 + -5.6b
5.9a = 0 + -5.6b
Remove the zero:
5.9a = -5.6b

Divide each side by '5.9'.
a = -0.9491525424b

Simplifying
a = -0.9491525424b