Answer:
4
Step-by-step explanation:
y-7=21
+7 +7
y=21+7
y=28
-7(2)+y=60
-14+y=60
y=60+14
Y=74
Answer:51 Groups
Step-by-step explanation:
60 students + 42 students = 102
102 divided by 2 = 51 Total groups.
Answer:
nothing is there
Step-by-step explanation: