7(3b-15)=

Solution for 7(3b-15)= equation:

Simplifying
7(3b + -15) = 0

Reorder the terms:
7(-15 + 3b) = 0
(-15 * 7 + 3b * 7) = 0
(-105 + 21b) = 0

Solving
-105 + 21b = 0

Solving for variable 'b'.

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

Add '105' to each side of the equation.
-105 + 105 + 21b = 0 + 105

Combine like terms: -105 + 105 = 0
0 + 21b = 0 + 105
21b = 0 + 105

Combine like terms: 0 + 105 = 105
21b = 105

Divide each side by '21'.
b = 5

Simplifying
b = 5