6b-0.4=7b

Solution for 6b-0.4=7b equation:

Simplifying
6b + -0.4 = 7b

Reorder the terms:
-0.4 + 6b = 7b

Solving
-0.4 + 6b = 7b

Solving for variable 'b'.

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

Add '-7b' to each side of the equation.
-0.4 + 6b + -7b = 7b + -7b

Combine like terms: 6b + -7b = -1b
-0.4 + -1b = 7b + -7b

Combine like terms: 7b + -7b = 0
-0.4 + -1b = 0

Add '0.4' to each side of the equation.
-0.4 + 0.4 + -1b = 0 + 0.4

Combine like terms: -0.4 + 0.4 = 0.0
0.0 + -1b = 0 + 0.4
-1b = 0 + 0.4

Combine like terms: 0 + 0.4 = 0.4
-1b = 0.4

Divide each side by '-1'.
b = -0.4

Simplifying
b = -0.4