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nast248
@nast248
July 2022
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Пожалуйста.помогите!
4,2/25,2
2целые2/5/1целая1/15
4целых2/7*1целую3/4-3,36/0,8+1,5
Решите уравнение 1/7х+3/14х=3,5
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Олег200203
4,2: 25,2=4 1/5: 25 1/5= 21/5* 5/126= 1/6
2 2/5: 1 1/15= 12/5*15/16=9/4= 2 1/4
4 2/7* 1 3/4-3,36:0,8+1,5= 4,5
1) 4 2/7* 1 3/4= 30/7* 7/4=15/2= 7 1/2= 7, 2
2) 3,36:0,8=4,2
4) 7,2-4,2= 3
5) 3+1,5= 4,5
1/7х+ 3/14х= 3,5
( 1/7+ 3/14)*х= 3,5
(2/4+ 3/14)*х= 3,5
5/14х= 3,5
х= 3,5: 5/14
х= 3 1/2: 5/14
х= 7/2* 14/5
х=49/5
х= 9 4/5
х= 9,8
2 votes
Thanks 1
nast248
Спасиииибо;*
Олег200203
пожалуйста
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Answers & Comments
2 2/5: 1 1/15= 12/5*15/16=9/4= 2 1/4
4 2/7* 1 3/4-3,36:0,8+1,5= 4,5
1) 4 2/7* 1 3/4= 30/7* 7/4=15/2= 7 1/2= 7, 2
2) 3,36:0,8=4,2
4) 7,2-4,2= 3
5) 3+1,5= 4,5
1/7х+ 3/14х= 3,5
( 1/7+ 3/14)*х= 3,5
(2/4+ 3/14)*х= 3,5
5/14х= 3,5
х= 3,5: 5/14
х= 3 1/2: 5/14
х= 7/2* 14/5
х=49/5
х= 9 4/5
х= 9,8