3(2+q)
+ 15 simplified is

3q + 21

Step-by-step explanation: just simplify it

3q+21 simplified, also

q = -7

Step-by-step explanation:

Just multiply the 3 out, then add 15+6 to get 21.

3(2+q)+15 = 0  Subtract 15

3(2+q) = -15 Divide by 3

2+q = -5 Subtract 2

q = -7

7

step-by-step explanation:

i'm assuming you need to figure out how many campers go into each tent.

i got the answer by:

24+4=28

28/4=7  

not only in mathematics, scientific proof also are required in the other field of science. also maths proofs are of particular structure, containing steps and logics. so proving is like doing science, it is science. that's why it is important to prove. 

an inaccurate proof leads to errors, or stating results that are not accurate.  which wil mess the probelm up you dont want this