4+.2b=.3b

Solution for 4+.2b=.3b equation:

Simplifying
4 + 0.2b = 0.3b

Solving
4 + 0.2b = 0.3b

Solving for variable 'b'.

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

Add '-0.3b' to each side of the equation.
4 + 0.2b + -0.3b = 0.3b + -0.3b

Combine like terms: 0.2b + -0.3b = -0.1b
4 + -0.1b = 0.3b + -0.3b

Combine like terms: 0.3b + -0.3b = 0.0
4 + -0.1b = 0.0

Add '-4' to each side of the equation.
4 + -4 + -0.1b = 0.0 + -4

Combine like terms: 4 + -4 = 0
0 + -0.1b = 0.0 + -4
-0.1b = 0.0 + -4

Combine like terms: 0.0 + -4 = -4
-0.1b = -4

Divide each side by '-0.1'.
b = 40

Simplifying
b = 40