4(b-3.9)=2(b+1)

Solution for 4(b-3.9)=2(b+1) equation:

Simplifying
4(b + -3.9) = 2(b + 1)

Reorder the terms:
4(-3.9 + b) = 2(b + 1)
(-3.9 * 4 + b * 4) = 2(b + 1)
(-15.6 + 4b) = 2(b + 1)

Reorder the terms:
-15.6 + 4b = 2(1 + b)
-15.6 + 4b = (1 * 2 + b * 2)
-15.6 + 4b = (2 + 2b)

Solving
-15.6 + 4b = 2 + 2b

Solving for variable 'b'.

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

Add '-2b' to each side of the equation.
-15.6 + 4b + -2b = 2 + 2b + -2b

Combine like terms: 4b + -2b = 2b
-15.6 + 2b = 2 + 2b + -2b

Combine like terms: 2b + -2b = 0
-15.6 + 2b = 2 + 0
-15.6 + 2b = 2

Add '15.6' to each side of the equation.
-15.6 + 15.6 + 2b = 2 + 15.6

Combine like terms: -15.6 + 15.6 = 0.0
0.0 + 2b = 2 + 15.6
2b = 2 + 15.6

Combine like terms: 2 + 15.6 = 17.6
2b = 17.6

Divide each side by '2'.
b = 8.8

Simplifying
b = 8.8