Matte algebra

elever = x

valpar = x - 20

Loppor = 10x

Lärare = 1


2x + 4x - 80 + 60x + 2 =1440  

66x - 78 = 1440

66x - 78 + 78 = 1440 + 78

66x = 1518

66x/66 = 1518/66

Svar 23 elever