Question

solve for b.
9 + b = a
b = \boxed{}

Explanation:

Step1: Isolate $b$ by subtracting 9

Subtract 9 from both sides of the equation.
$9 + b - 9 = a - 9$

Step2: Simplify both sides

Cancel 9 on the left side.
$b = a - 9$

Answer:

$b = a - 9$