7*(3a-b)-20a+7B=

Solution for 7*(3a-b)-20a+7B= equation:

Simplifying
7(3a + -1b) + -20a + 7B = 0
(3a * 7 + -1b * 7) + -20a + 7B = 0
(21a + -7b) + -20a + 7B = 0

Reorder the terms:
7B + 21a + -20a + -7b = 0

Combine like terms: 21a + -20a = 1a
7B + 1a + -7b = 0

Solving
7B + 1a + -7b = 0

Solving for variable 'B'.

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

Add '-1a' to each side of the equation.
7B + 1a + -1a + -7b = 0 + -1a

Combine like terms: 1a + -1a = 0
7B + 0 + -7b = 0 + -1a
7B + -7b = 0 + -1a
Remove the zero:
7B + -7b = -1a

Add '7b' to each side of the equation.
7B + -7b + 7b = -1a + 7b

Combine like terms: -7b + 7b = 0
7B + 0 = -1a + 7b
7B = -1a + 7b

Divide each side by '7'.
B = -0.1428571429a + b

Simplifying
B = -0.1428571429a + b