5/8х+7.04х=3.21 Помогите плиз

Question

5/8х+7.04х=3.21
Помогите плиз

Answer 1

0,625x+7,04x=3,21
7665/1000x=321/100
x=(321/100)×(1000/7665)
x=3210/7665
x=642/1533