Question

Помогите решить, плиз))

Answer 1

(5,8х-40,1)/0,8=(3,2х-23,9)/(-2,4);
3(5,8х-40,1)=-(3,2х-23,9);
17,4х-120,3=-3,2х+23,9;
20,6х=144,2;
х=7
(5,8*7-40,1)/0,8=(3,2*7-23,9)/(-2,4);
(40,6-40,1)/0,8=(22,4-23,9)/(-2,4);
0,5/0,8=(-1,5)/(-2,4);
0,625=0,625