What is the value of x?

Compare these two waves: the blue and orange waves have the same pitch, but the blue wave is louder. the blue and orange waves have the same volume, but the blue wave has a higher pitch. the orange wave has a higher pitch, but the blue wave is louder. the blue wave has a higher pitch, but the orange wave is louder.

2x minus y equals 6, x plus y equals negative 3

Alex's monthly take home pay is $2,500. what is the maximum bad debt payment he can maintain without being in credit overload?