3.1(a+b)+8.7a=

Solution for 3.1(a+b)+8.7a= equation:

Simplifying
3.1(a + b) + 8.7a = 0
(a * 3.1 + b * 3.1) + 8.7a = 0
(3.1a + 3.1b) + 8.7a = 0

Reorder the terms:
3.1a + 8.7a + 3.1b = 0

Combine like terms: 3.1a + 8.7a = 11.8a
11.8a + 3.1b = 0

Solving
11.8a + 3.1b = 0

Solving for variable 'a'.

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

Add '-3.1b' to each side of the equation.
11.8a + 3.1b + -3.1b = 0 + -3.1b

Combine like terms: 3.1b + -3.1b = 0.0
11.8a + 0.0 = 0 + -3.1b
11.8a = 0 + -3.1b
Remove the zero:
11.8a = -3.1b

Divide each side by '11.8'.
a = -0.2627118644b

Simplifying
a = -0.2627118644b