-9-7b=3(b+7)

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Solution for -9-7b=3(b+7) equation:


Simplifying
-9 + -7b = 3(b + 7)

Reorder the terms:
-9 + -7b = 3(7 + b)
-9 + -7b = (7 * 3 + b * 3)
-9 + -7b = (21 + 3b)

Solving
-9 + -7b = 21 + 3b

Solving for variable 'b'.

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

Add '-3b' to each side of the equation.
-9 + -7b + -3b = 21 + 3b + -3b

Combine like terms: -7b + -3b = -10b
-9 + -10b = 21 + 3b + -3b

Combine like terms: 3b + -3b = 0
-9 + -10b = 21 + 0
-9 + -10b = 21

Add '9' to each side of the equation.
-9 + 9 + -10b = 21 + 9

Combine like terms: -9 + 9 = 0
0 + -10b = 21 + 9
-10b = 21 + 9

Combine like terms: 21 + 9 = 30
-10b = 30

Divide each side by '-10'.
b = -3

Simplifying
b = -3

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