3(1.2b)+3.6=4.2

Solution for 3(1.2b)+3.6=4.2 equation:

Simplifying
3(1.2b) + 3.6 = 4.2

Remove parenthesis around (1.2b)
3 * 1.2b + 3.6 = 4.2

Multiply 3 * 1.2
3.6b + 3.6 = 4.2

Reorder the terms:
3.6 + 3.6b = 4.2

Solving
3.6 + 3.6b = 4.2

Solving for variable 'b'.

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

Add '-3.6' to each side of the equation.
3.6 + -3.6 + 3.6b = 4.2 + -3.6

Combine like terms: 3.6 + -3.6 = 0.0
0.0 + 3.6b = 4.2 + -3.6
3.6b = 4.2 + -3.6

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

Divide each side by '3.6'.
b = 0.1666666667

Simplifying
b = 0.1666666667