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 .
Your answer would be 14.978
Answer:
A: 5+7+2.5=14.5/3=4.8333333
B: 6+12+3.5=21.5/3=7.16666666
There might be a variety of averages for the 12 boys.
B
Equivalent fractions are made when you multiply both the top (numerator) and the bottom (denominator) of the fraction by the same number. The only choice that is correct here is B.
