(15d+d):4=3

Question

(15d+d):4=3

Answer 1

(15d+d):4=3, (15d+d)=3*4, 16d=12, d=12/16, d=0,75 проверка (15*0,75+0,75)/4=3

Answer 2

3,75d+0,25d=3 4d=3 d=0,75