3(12b-1)+3.6=4.2

Solution for 3(12b-1)+3.6=4.2 equation:

Simplifying
3(12b + -1) + 3.6 = 4.2

Reorder the terms:
3(-1 + 12b) + 3.6 = 4.2
(-1 * 3 + 12b * 3) + 3.6 = 4.2
(-3 + 36b) + 3.6 = 4.2

Reorder the terms:
-3 + 3.6 + 36b = 4.2

Combine like terms: -3 + 3.6 = 0.6
0.6 + 36b = 4.2

Solving
0.6 + 36b = 4.2

Solving for variable 'b'.

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

Add '-0.6' to each side of the equation.
0.6 + -0.6 + 36b = 4.2 + -0.6

Combine like terms: 0.6 + -0.6 = 0.0
0.0 + 36b = 4.2 + -0.6
36b = 4.2 + -0.6

Combine like terms: 4.2 + -0.6 = 3.6
36b = 3.6

Divide each side by '36'.
b = 0.1

Simplifying
b = 0.1