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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