问题
解答题
求未知数x.
|
答案
(1)7x=
,15x-1 2
14x=15x-1,
14x+1=15x-1+1,
14x+1-14x=15x-14x,
x=1;
(2)
=6.5 x
,3 1 4 6
3
x=6.5×6,1 4
3
x÷31 4
=39÷31 4
,1 4
x=12.
求未知数x.
|
(1)7x=
,15x-1 2
14x=15x-1,
14x+1=15x-1+1,
14x+1-14x=15x-14x,
x=1;
(2)
=6.5 x
,3 1 4 6
3
x=6.5×6,1 4
3
x÷31 4
=39÷31 4
,1 4
x=12.