Question 712225
S+G+M=124
G=S+9
M=3S
S+(S+9)+3S=124
5S=124-9
5S=115
S=115/5
S=23 MESSAGES SENT.
G=23+9=32 MESSAGES SENT.
M=3*23=69 MESSAGES SENT.
PROOF:
23+32+69=124
124=124