Question

1 213*(37х-56)=2.5 решите плизззз

Answer 1

15/13*(3/7х-5/6)=2,5
45/91х-25/26=2,5
45/91х=2,5+25/26
45/91х=25/10+25/26
45/91х=45/13
х=45/13:45/91
х=45/13*91/45
х=7