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求未知数x的值.(1)5x+0.75×4=6.5(2)x:514=21:58.

题目详情
求未知数x的值.
(1)5x+0.75×4=6.5 (2)x:
5
14
=21:
5
8
求未知数x的值.
(1)5x+0.75×4=6.5 (2)x:
5
14
=21:
5
8
求未知数x的值.
(1)5x+0.75×4=6.5 (2)x:
5
14
=21:
5
8
求未知数x的值.
(1)5x+0.75×4=6.5 (2)x:
5
14
=21:
5
8
求未知数x的值.
(1)5x+0.75×4=6.5 (2)x:
5
14
=21:
5
8
(1)5x+0.75×4=6.5 (2)x:
5
14
=21:
5
8
(1)5x+0.75×4=6.5 (2)x:
5
14
=21:
5
8
(1)5x+0.75×4=6.5 (2)x:
5
14
=21:
5
8
(1)5x+0.75×4=6.5 (2)x:
5
14
=21:
5
8
5
14
=21:
5
8
5
14
5 14 5 5 14 14
5
8
5
8
5 8 5 5 8 8
▼优质解答
答案和解析
(1)5x+0.75×4=6.5, 5x+3=6.5, 5x+3-3=6.5-3,5x=3.5, 5x÷5=3.5÷5, x=0.7;(2)x: 5 14 =21: 5 8 , 5 8 x= 5 14 ×21 5 8 x= 15 ...