21=7(b+1)

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Solution for 21=7(b+1) equation:


Simplifying
21 = 7(b + 1)

Reorder the terms:
21 = 7(1 + b)
21 = (1 * 7 + b * 7)
21 = (7 + 7b)

Solving
21 = 7 + 7b

Solving for variable 'b'.

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

Add '-7b' to each side of the equation.
21 + -7b = 7 + 7b + -7b

Combine like terms: 7b + -7b = 0
21 + -7b = 7 + 0
21 + -7b = 7

Add '-21' to each side of the equation.
21 + -21 + -7b = 7 + -21

Combine like terms: 21 + -21 = 0
0 + -7b = 7 + -21
-7b = 7 + -21

Combine like terms: 7 + -21 = -14
-7b = -14

Divide each side by '-7'.
b = 2

Simplifying
b = 2

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