Remove the brackets
-5a + 9b + 7a combine -5a and 7a
7a - 5a + 9b
2a + 9b Answer
Don't go any further. There is nothing else to do. These are unlike terms and cannot be reduced or combined.

3*boys=2*18
3*boys=36
boys=12
12+18=30
total number of students: 30
Step-by-step explanation:
17.0 there you go I hope this helped
Try doing A, 2/3 Hopefully it helps you, I'm not good with fractions.
Answer:
Dont know what your asking for
Step-by-step explanation: