8-4÷8/15
=8-4×15/8
=8-15/2
=1/2
(4/5+3/2÷6)×4/7
=(4/5+1/4)×4/7
=4/5×4/7+1/4×4/7
=16/35+1/7
=3/5
2x÷4/15=3/7
2x=3/7×4/15
2x=4/35
x≡4/35÷2
x=2/35
(1-5/8)x=6
3/8x=6
x=6÷3/8
x=16
3/4x-3/4=1/4
3/4x=1/4+3/4
3/4x=1
x=4/3
8-4÷8/15
=8-4×15/8
=8-15/2
=1/2
(4/5+3/2÷6)×4/7
=(4/5+1/4)×4/7
=4/5×4/7+1/4×4/7
=16/35+1/7
=3/5
2x÷4/15=3/7
2x=3/7×4/15
2x=4/35
x≡4/35÷2
x=2/35
(1-5/8)x=6
3/8x=6
x=6÷3/8
x=16
3/4x-3/4=1/4
3/4x=1/4+3/4
3/4x=1
x=4/3