.4(a+2)+0.1a=

Solution for .4(a+2)+0.1a= equation:

Simplifying
0.4(a + 2) + 0.1a = 0

Reorder the terms:
0.4(2 + a) + 0.1a = 0
(2 * 0.4 + a * 0.4) + 0.1a = 0
(0.8 + 0.4a) + 0.1a = 0

Combine like terms: 0.4a + 0.1a = 0.5a
0.8 + 0.5a = 0

Solving
0.8 + 0.5a = 0

Solving for variable 'a'.

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

Add '-0.8' to each side of the equation.
0.8 + -0.8 + 0.5a = 0 + -0.8

Combine like terms: 0.8 + -0.8 = 0.0
0.0 + 0.5a = 0 + -0.8
0.5a = 0 + -0.8

Combine like terms: 0 + -0.8 = -0.8
0.5a = -0.8

Divide each side by '0.5'.
a = -1.6

Simplifying
a = -1.6