‏‏‎ ‎‏‏‎sauce‏‏‎ ‎‏‏‎‏‏‎ ‎‏‏‎

2x+3y=12 x-y=6 solve the following system equations

Solve this riddle: i am an odd number. i an less than 100. the some of my digit is 12. i am a multiple of 15. what number am i?

Money off coupons have been circulated to 300 households. only 2/5 of these were redeemed (used) in the local supermarket to get a free shampoo. what fraction of coupons were unused? (ps: write how you got the answer)