91=7(b+7)

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Solution for 91=7(b+7) equation:


Simplifying
91 = 7(b + 7)

Reorder the terms:
91 = 7(7 + b)
91 = (7 * 7 + b * 7)
91 = (49 + 7b)

Solving
91 = 49 + 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.
91 + -7b = 49 + 7b + -7b

Combine like terms: 7b + -7b = 0
91 + -7b = 49 + 0
91 + -7b = 49

Add '-91' to each side of the equation.
91 + -91 + -7b = 49 + -91

Combine like terms: 91 + -91 = 0
0 + -7b = 49 + -91
-7b = 49 + -91

Combine like terms: 49 + -91 = -42
-7b = -42

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

Simplifying
b = 6

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