Ответ:
Пошаговое объяснение:
а) 2/7х= 2 2/7
х= 16/7 * 7/2
х=8
б) 3/5у= 2 9/10 - 1/5
3/5у= 29/10 - 1/5
3/5у= 27/10
у= 27/10 *5/3
у= 4 1/2
в) 3 1/3 : к = 1 1/3 : 2
4/3к= 2* 10/3
к= 20/3 * 3/4
к= 5
д) у : 1 1/2 = 2 1/3 *1/3
1/3у= 3/2 * 7/3
1/3у= 7/2
у= 7/2 * 3
у= 10 1/2
е) 2/7х + 3/7х= 2 7/14
5/7х= 35/14
х= 35/14 * 7/5
х= 3 1/2
ж) m + 3/8m= 1/4
11/8m = 1/4
m= 1/4 * 8/11
m= 2/11
з) 3 1/2 *(2/3х + 4/7)= 2 1/3
7/2 *(2/3х+4/7) = 7/3
2/3х+4/7 = 7/3 * 2/7
2/3х+4/7 = 2/3
2/3х= 2/3 - 4/7
2/3х= 2/21
х= 2/21 * 3/2
х= 1/7
и) (5/8х -1/5) *3/4= 3/4
5/8х -1/5 = 3/4 * 4/3
5/8х -1/5 = 1
5/8х= 1 + 1/5
5/8х= 1 1/5
х= 6/5 * 8/5
х= 48/25
х= 1 23/25
Copyright © 2024 SCHOLAR.TIPS - All rights reserved.
Answers & Comments
Ответ:
Пошаговое объяснение:
а) 2/7х= 2 2/7
х= 16/7 * 7/2
х=8
б) 3/5у= 2 9/10 - 1/5
3/5у= 29/10 - 1/5
3/5у= 27/10
у= 27/10 *5/3
у= 4 1/2
в) 3 1/3 : к = 1 1/3 : 2
4/3к= 2* 10/3
к= 20/3 * 3/4
к= 5
д) у : 1 1/2 = 2 1/3 *1/3
1/3у= 3/2 * 7/3
1/3у= 7/2
у= 7/2 * 3
у= 10 1/2
е) 2/7х + 3/7х= 2 7/14
5/7х= 35/14
х= 35/14 * 7/5
х= 3 1/2
ж) m + 3/8m= 1/4
11/8m = 1/4
m= 1/4 * 8/11
m= 2/11
з) 3 1/2 *(2/3х + 4/7)= 2 1/3
7/2 *(2/3х+4/7) = 7/3
2/3х+4/7 = 7/3 * 2/7
2/3х+4/7 = 2/3
2/3х= 2/3 - 4/7
2/3х= 2/21
х= 2/21 * 3/2
х= 1/7
и) (5/8х -1/5) *3/4= 3/4
5/8х -1/5 = 3/4 * 4/3
5/8х -1/5 = 1
5/8х= 1 + 1/5
5/8х= 1 1/5
х= 6/5 * 8/5
х= 48/25
х= 1 23/25