问题
解答题
求未知数x
|
答案
(1)5x-24×5=151,
5x-120=151,
5x-120+120=151+120,
5x=271,
5x÷5=271÷5,
x=54.2;
(2)
=80%,5 x
=5 x
,4 5
4x=25,
4x÷4=25÷4,
x=
;25 4
(3)14:x=3.5:8,
3.5x=14×8,
3.5x÷3.5=14×8÷3.5,
x=32.
求未知数x
|
(1)5x-24×5=151,
5x-120=151,
5x-120+120=151+120,
5x=271,
5x÷5=271÷5,
x=54.2;
(2)
=80%,5 x
=5 x
,4 5
4x=25,
4x÷4=25÷4,
x=
;25 4
(3)14:x=3.5:8,
3.5x=14×8,
3.5x÷3.5=14×8÷3.5,
x=32.