Answer:
See below
Step-by-step explanation:
1. 12
2. 15 [3*12-21 = 15]
3. 24 [3*15-21 = 24]
4. 51 [3*24 - 21 = 51]
Answer:
10
Step-by-step explanation:
32-b=3b-8
32+8=3b+b
40=4b
b=10
Answer:
1/3
Step-by-step explanation:
2/3 plus -1/3 is the same as subtracting 1/3 from 2/3.
Answer:
ok
Step-by-step explanation:
Answer:
The expression simplifies to 
.
Step-by-step explanation:
The expression
can be rearranged and written as
In this form the 
terms in the numerator and in the denominator cancel to give
The 
are present both in the numerator and in the denominator, so they also cancel, and the fraction 
simplifies to 
, so finally our expression becomes:
Which is our answer:)
