Question 304824
B+R=540 OR B=540-R
15B+20R=9.750
15(540-R)+20R=9,750
8,100-15R+20R=9,750
5R=9,750-8,100
5R=1,650
R=1,650/5
R=330 ORCHESTRA TICKETS SOLD.
540-330=210 BALCONY TICKETS SOLD.
PROOF:
15*210+20*330=9,750
3,150+6,600=9,750
9.750=9.750