问题
解答题
求未知数x的值: x+
9(x-1)=3(x+8) 0.372:0744=
|
答案
(1)x+
x=1 2
,4 5
(1+
)x=1 2
,4 5
x=3 2
,4 5
x×3 2
=2 3
×4 5
,2 3
x=
;8 15
(2)9(x-1)=3(x+8),
9x-9=3x+24,
9x-9+9=3x+24+9,
9x=3x+33,
9x-3x=3x+33-3x,
6x=33,
6x÷6=33÷6,
x=
;11 2
(3)0.372:0.744=
:x,1 10
0.372x=0.744×0.1,
0.372x÷0.372=0.0744÷0.372,
x=0.2.