x − n u mb er 11 x + 2 = 6 + 9 x ∣ s u b t r a c t 2 11 x = 4 + 9 x ∣ s u b t r a c t 9 x 2 x = 4 ∣ d i v i d e b y 2 x = 2 S o l u t i o n i s n u mb er e q u a l t o 2.
The unknown number is 2. We defined the number as x , set up the equation from the problem, and solved it step-by-step, arriving at x = 2 .
;