21=-2+8(b+3)

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


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

Reorder the terms:
21 = -2 + 8(3 + b)
21 = -2 + (3 * 8 + b * 8)
21 = -2 + (24 + 8b)

Combine like terms: -2 + 24 = 22
21 = 22 + 8b

Solving
21 = 22 + 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 + -8b = 22 + 8b + -8b

Combine like terms: 8b + -8b = 0
21 + -8b = 22 + 0
21 + -8b = 22

Add '-21' to each side of the equation.
21 + -21 + -8b = 22 + -21

Combine like terms: 21 + -21 = 0
0 + -8b = 22 + -21
-8b = 22 + -21

Combine like terms: 22 + -21 = 1
-8b = 1

Divide each side by '-8'.
b = -0.125

Simplifying
b = -0.125

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