0.78(b+2)=3.9

Solution for 0.78(b+2)=3.9 equation:

Simplifying
0.78(b + 2) = 3.9

Reorder the terms:
0.78(2 + b) = 3.9
(2 * 0.78 + b * 0.78) = 3.9
(1.56 + 0.78b) = 3.9

Solving
1.56 + 0.78b = 3.9

Solving for variable 'b'.

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

Add '-1.56' to each side of the equation.
1.56 + -1.56 + 0.78b = 3.9 + -1.56

Combine like terms: 1.56 + -1.56 = 0.00
0.00 + 0.78b = 3.9 + -1.56
0.78b = 3.9 + -1.56

Combine like terms: 3.9 + -1.56 = 2.34
0.78b = 2.34

Divide each side by '0.78'.
b = 3

Simplifying
b = 3