问题
解答题
求未知数x.
|
答案
①26+2x=102,
26+2x-26=102-26,
2x=76,
2x÷2=76÷2,
x=38;
②x:
=4 5
:10,5 12
10x=
,1 3
10x÷10=
÷10,1 3
x=
;1 30
③
=6 x
,2.4 5
2.4x=30,
2.4x÷2.4=30÷2.4,
x=12.5.
求未知数x.
|
①26+2x=102,
26+2x-26=102-26,
2x=76,
2x÷2=76÷2,
x=38;
②x:
=4 5
:10,5 12
10x=
,1 3
10x÷10=
÷10,1 3
x=
;1 30
③
=6 x
,2.4 5
2.4x=30,
2.4x÷2.4=30÷2.4,
x=12.5.