Question

номер 997! ПОМОГИТЕ ПОЖАЛУЙСТА!!!!!!

Answer 1

997
1)1/6:(1/4х-1/3)-3/8=1/40
1/6:(1/4х-1/3)=1/40+3/8
1/6:(1/4х-1/3)=2/5
1/4х-1/3=1/6:2/5
1/4х-1/3=5/12
1/4х=5/12+1/3
1/4х=3/4
х=3/4:1/4
х=3

2)1/4:(3/4х-1/2)+2/5=1/2
1/4:(3/4х-1/2)=1/2-2/5
1/4:(3/4х-1/2)=1/10
3/4х-1/2=1/4:1/10
3/4х-1/2=10/4
3/4х=10/4+1/2
3/4х=3
х=3:3/4
х=4