3(b+7)-5b=

Solution for 3(b+7)-5b= equation:

Simplifying
3(b + 7) + -5b = 0

Reorder the terms:
3(7 + b) + -5b = 0
(7 * 3 + b * 3) + -5b = 0
(21 + 3b) + -5b = 0

Combine like terms: 3b + -5b = -2b
21 + -2b = 0

Solving
21 + -2b = 0

Solving for variable 'b'.

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

Add '-21' to each side of the equation.
21 + -21 + -2b = 0 + -21

Combine like terms: 21 + -21 = 0
0 + -2b = 0 + -21
-2b = 0 + -21

Combine like terms: 0 + -21 = -21
-2b = -21

Divide each side by '-2'.
b = 10.5

Simplifying
b = 10.5