Answer:
2) Add 21 to both sides
Step-by-step explanation:
When solving
for
, our goal to isolate
such that we have
set equal to something.
Therefore, we want to start by adding 21 to both sides. This leaves us with
and we are one step closer to isolating
.
Answer:

Step-by-step explanation:
=> 
Using the distributive property
=> 
2x+3m=p because you don't know how many people there are you put a variable in place for that
Hydrosphere
hydro means water