Question

7×+3=30-2×

5,4-1,5×=0,3×-36

Answer 1

7х+2х=30-3
9х=27
х=27/9=3

5,4+36=0,3х+1,5х
41,4=1,8х
х=41,4/1,8=23

Answer 2

на фотке все расписано)