b) 3/5y= 4- 2/5 3/5y= 4/4 -2/5 3/5y= 9/20 - 6/20 3/5y= 3/20 / :3/5 y= 3/20 x 5/3 y= 1/4

b) 3/5y = 4- 2/5 ⅗y = ⁴/₁ - ⅖ ⅗y = ²⁰/₅ - ⅖ ⅗y = ¹⁸/₅|:⅗ y = ¹⁸/₅ * ⁵/₃ y = ⁹⁰/₁₅ y = 6 spr: 3/5y = 4- 2/5 ⅗*6 = 4-⅖ ¹⁸/₅ = 4-⅖ 3,6 = 3,6