1)3 2/7+x=5 3/7 2)3/4×(x-1/4)=1 5/16 3)x+8 3/7=9 4)(3 4/5-x)÷12/13=13/20 5)5 2/3×(12-x)=1 5/12 6) (x-2 1/8)÷7 5/6=1 7)3 2/5- x=1 7/15 8)(10-x)÷12/35 =35/12 решите уравнения !

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Ответ:

nurayhasanova2oztngy

16.08.2020 01:40

3 2/7 + х = 5 3/7
х = 5 3/7 - 3 2/7
х = 2 1/7
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3 2/7 + 2 1/7 = 5 3/7
5 3/7 = 5 3/7

3/4 * (х-1/4) = 1 5/16
3/4 * х - 3/4 * 1/4 = 1 5/16
3/4 * х - 3/16 = 1 5/16
3/4 * х = 1 5/16 + 3/16
3/4 * х = 1 8/16
3/4 * х = 1 1/2
х = 1 1/2 : 3/4 = 3/2 * 4/3 = 4/2
х=2
-------------------------------------
3/4 * (2 - 1/4) = 1 5/16
3/4 * 1 3/4 = 1 5/16
3/4 * 7/4 = 1 5/16
21/16 = 1 5/16
1 5/16 = 1 5/16

х + 8 3/7 = 9
х = 9 - 8 3/7
х = 4/7
------------------------------------
4/7 + 8 3/7 = 9
8 + 7/7 = 9
8 + 1 = 9
9=9

(3 4/5 - х ) : 12/13 = 13/20
3 4/5 - х = 13/20 * 12/13
3 4/5 - х = 12/20
3 4/5 - х = 3/5
х=3 4/5 - 3/5
х= 3 1/5
----------------------------------------
(3 4/5 - 3 1/5) : 12/13 = 13/20
3/5 : 12/13 = 13/20
3/5 * 13/12 = 13/20
13/20 = 13/20

5 2/3 * (12-х) = 1 5/12
12 - х = 1 5/12 : 5 2/3
12 - х = 17/12 * 3/17
12 - х = 3/12
12 - х = 1/4
х= 12 - 1/4
х = 11 3/4
------------------------------------------
5 2/3 * (12 - 11 3/4) = 1 5/12
17/3 * 1/4 = 1 5/12
17/12 = 1 5/12
1 5/12 = 1 5/12

(х - 2 1/8) : 7 5/6 = 1
х - 2 1/8 = 1 * 7 5/6
х = 7 5/6+ 2 1/8 = 7 20/24 + 2 3/24
х = 9 23/24
----------------------------------------------
(9 23/24 - 2 1/8) : 7 5/6 = 1
(9 23/24 - 2 3/24) : 7 5/6 = 1
7 20/24 : 7 5/6 =1
7 5/6 : 7 5/6 = 1
1=1

3 2/5 - х = 1 7/15
х = 3 2/5 - 1 7/15 = 3 6/15 - 1 7/15 = 1+ ( 21/15 - 7/15)
х =1 14/15
--------------------------------------------
3 2/5 - 1 14/15 = 1 7/15
3 6/15 - 1 14/15 = 1 7/15
51/15 - 29/15 = 1 7/15
22/15 = 1 7/15
1 7/15 = 1 7/15

(10-х) : 12/35 = 35/12
10-х = 35/12 * 12/35
10-х=1
х=10-1
х=9
------------------------------
(10-9) : 12/35 = 35/12
1 : 12/35 = 35/12
1 * 35/12 = 35/12
35/12=35/12
2 11/12 = 2 11/12

1)3 2/7+x=5 3/7 2)3/4×(x-1/4)=1 5/16 3)x+8 3/7=9 4)(3 4/5-x)÷12/13=13/20 5)5 2/3×(12-x)=1 5/12 6) (x