Solve the following proportion for x.

11/5 = 12/x

round answer to the nearest tenth.

7x+8y=-18, 4x-9y=-3 solve the system of equations

Hardest math question of all time can you solve the equation. check for extraneous solutions.9∣9-8x∣ = 2x+3

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)