问题
解答题
|
答案
①
x÷5 7
=5 14
÷(1-7 8
)5 9
x×5 7
=14 5
×7 8 9 4
2x=63 32
2x×
=1 2
×63 32 1 2
x=
;63 64
②
x÷5 7
=5 14 7 8
x×5 7
=14 5 7 8
2x=7 8
2x×
=1 2
×7 8 1 2
x=
;7 16
③x÷(1-
)=5 9 4 5
x×
=9 4 4 5
x×
×9 4
=4 9
×4 5 4 9
x=
;8 45