3(1.2b+2.1)=

Solution for 3(1.2b+2.1)= equation:

Simplifying
3(1.2b + 2.1) = 0

Reorder the terms:
3(2.1 + 1.2b) = 0
(2.1 * 3 + 1.2b * 3) = 0
(6.3 + 3.6b) = 0

Solving
6.3 + 3.6b = 0

Solving for variable 'b'.

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

Add '-6.3' to each side of the equation.
6.3 + -6.3 + 3.6b = 0 + -6.3

Combine like terms: 6.3 + -6.3 = 0.0
0.0 + 3.6b = 0 + -6.3
3.6b = 0 + -6.3

Combine like terms: 0 + -6.3 = -6.3
3.6b = -6.3

Divide each side by '3.6'.
b = -1.75

Simplifying
b = -1.75