2.48 ÷ = 2,480 ÷ 57 what is the missing (decimal) number

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers

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)

Akitchen is 12 ft. by 14 ft. with 10 ft. high walls. how much would it cost to put vinyl flooring in this room? $8.80 per ft