Find TWO factors that are equivalent to 1/2

The decibel level of sound is 50 db greater on a busy street than in a quiet room where the intensity of sound is watt/m2. the level of sound in the quiet room is db, and the intensity of sound in the busy street is watt/m2. use the formula , where is the sound level in decibels, i is the intensity of sound, and is the smallest sound intensity that can be heard by the human ear (roughly equal to watts/m2).

Brent wants to know what is 5 x 1/2

Solve 3x-18=2y and 5x-6y=14 by elimination or substitution . show all !