9:x=1/3:1/4 4.25x-1.75×2=5.
问题描述:
9:x=
|
4.25x-1.75×2=5. |
答
9:x=
:1 3
,1 4
x=1 3
×9,1 4
x×3=1 3
×3,9 4
x=
;27 4
4.25x-1.75×2=5.
4.25x-3.5=5,
4.25x-3.5+3.5=5+3.5,
4.25x=8.5,
4.25x÷4.25=8.5÷4.25,
x=2.