Question 1179543
Miranda, Ramiro, and Gabriel sent a total of 109 text messages during the weekend. Gabriel sent 2 times as many messages as Ramiro. Miranda sent 9 more messages than Ramiro. 

let m,r, g be the messages sent by them

m+r+g =109

Gabriel sent 2 times as many messages as Ramiro
g=2r, 
Miranda sent 9 more messages than Ramiro. 

m=r+9 

substitute g & m in (1)

r+9 +2r+r=169

4r = 160
r=40

m=49
g= 80