Question

Помогите решить 1,6(2х-0,42)=2 4/5:7/20

Answer 1

(х + 2 5/6) : 20 + 7 1/5 = 7 1/2(х + 2 5/6) : 20 = 7 1/2 - 7 1/5 = 7 5/10 - 7 2/10 = 3/10х + 2 5/6 = 3/10 * 20 = 60/10 = 6х = 6 - 2 5/6 = 5 6/6 - 2 5/6 = 3 1/6х = 3 1/6