13=2.6+b

Solution for 13=2.6+b equation:

Simplifying
13 = 2.6 + b

Solving
13 = 2.6 + b

Solving for variable 'b'.

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

Add '-1b' to each side of the equation.
13 + -1b = 2.6 + b + -1b

Combine like terms: b + -1b = 0
13 + -1b = 2.6 + 0
13 + -1b = 2.6

Add '-13' to each side of the equation.
13 + -13 + -1b = 2.6 + -13

Combine like terms: 13 + -13 = 0
0 + -1b = 2.6 + -13
-1b = 2.6 + -13

Combine like terms: 2.6 + -13 = -10.4
-1b = -10.4

Divide each side by '-1'.
b = 10.4

Simplifying
b = 10.4