Answer:
A. a=12, b=63.c =36
Step-by-step explanation:
Ax + c = R (subtract c from each side)
Ax + c - c = R - c
Ax = R - c (divide A from each side)
Ax/A = (R-c)/A
x = 
<-answer
She needs 4 groups at the most, having 6 kids leftover, 6×4=24, not that hard
Answer:
n = 2/3
Step-by-step explanation: