7(3+2b)=-21+8b

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Solution for 7(3+2b)=-21+8b equation:


Simplifying
7(3 + 2b) = -21 + 8b
(3 * 7 + 2b * 7) = -21 + 8b
(21 + 14b) = -21 + 8b

Solving
21 + 14b = -21 + 8b

Solving for variable 'b'.

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

Add '-8b' to each side of the equation.
21 + 14b + -8b = -21 + 8b + -8b

Combine like terms: 14b + -8b = 6b
21 + 6b = -21 + 8b + -8b

Combine like terms: 8b + -8b = 0
21 + 6b = -21 + 0
21 + 6b = -21

Add '-21' to each side of the equation.
21 + -21 + 6b = -21 + -21

Combine like terms: 21 + -21 = 0
0 + 6b = -21 + -21
6b = -21 + -21

Combine like terms: -21 + -21 = -42
6b = -42

Divide each side by '6'.
b = -7

Simplifying
b = -7

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