Of 375 musicians at a high school, some play only in the jazz band, some play only in the marching band, and some play in both. if 250 of them play in the jazz band, and 130 play in both, how many of the musicians are in the marching band?

//Find out how many only play in the jazz band, then find out how many must be in the marching band.

250 - 130 = 120 (Number that only play in jazz band)
375 - 120 = 255 (Number that play in marching band)

255 people play in the marching band, where 130 play in both and 125 play only in it.

The solution to the system of equations (-2,2)