Question

помогите решить!!!!!! 5x-1,2=7,4

Answer 1

5x-1,2=7,4
5х=7,4+1,2
5х=8,6
х=8,6/5
х=1,72

Answer 2

5х-1.2=7.4
5х=7.4+1.2
5х=8.6
х=8.6:5
х=1.72