A+S+C=120
12A+10S+6C=1100
A=C
2A+S=120
18A+10S=1100
multipuly top equation by 10, then subtract..
2A=100
A=50
C=50
S=20
Exactly 120 tickets were sold for a concert. The tickets cost $12 each for adults, $10 each for seniors, and $6 each for children. The number of adult tickets sold was equal to the number of child tickets sold. Given that the total revenue from the tickets sales was $1100, the number of senior tickets sold was?
3 answers
why do you multiply the equation? and how do you know that 2Ax100= 100???
10*
1 answer