Question

3 2/3 -2 1/2 : х =1 1/2 3/8*х+х=1 1/4
7 4/9*х + 1 2/3 =7 1/4
15 4/5х-2 2/3 =3 5/6​
РЕШИТЬ

Answer 1

Пошаговое объяснение:

3. 2/3 - 2. 1/2 : х = 1. 1/2

2. 1/2 : х = 3. 2/3 - 1. 1/2

2. 1/2 : х = 3. 4/6 - 1. 3/6

2. 1/2 : х = 2. 1/6

х = 2. 1/2 : 2. 1/6

х = 5/2 : 13/6

х = 5/2 * 6/13

х = 30/26

х = 15/13

х = 1. 2/13

3/8 * х + х = 1. 1/4

3/8х + х = 1. 1/4

1. 3/8х = 1. 1/4

11/8х = 5/4

х = 5/4 : 11/8

х = 5/4 * 8/11

х = 5/1 * 2/11

х = 10/11

7. 4/9 * х + 1. 2/3 = 7. 1/4

7. 4/9х + 1. 2/3 = 7. 1/4

7. 4/9х = 7. 1/4 - 1. 2/3

7. 4/9х = 7. 3/12 - 1. 8/12

7. 4/9х = 6. 15/12 - 1. 8/12

7. 4/9х = 5. 7/12

67/9х = 67/12

х = 67/12 : 67/9

х = 67/12 * 9/67

х = 9/12

х = 3/4

15. 4/5х - 2. 2/3 = 3. 5/6

15. 4/5х = 3. 5/6 + 2. 2/3

15. 4/5х = 3. 5/6 + 2. 4/6

15. 4/5х = 5. 9/6

79/5х = 39/6

79/5 = 13/2

х = 13/2 : 79/5

х = 13/2 * 5/79

х = 65/158

Answer 2

1)  

$3\frac{2}{3} -2\frac{1}{2} :x=1\frac{1}{2}$

$2\frac{1}{2} :x=3\frac{2}{3}-1\frac{1}{2}$

$2\frac{1}{2} :x=3\frac{4}{6}-1\frac{3}{6}$

$2\frac{1}{2} :x=2\frac{1}{6}$

$x=2\frac{1}{2}:2\frac{1}{6}$

$x=\frac{5}{2}*\frac{6}{13}=\frac{15}{13} =1\frac{2}{13}$

$x=1\frac{2}{13}$

2)

$\frac{3}{8} *x+x=1\frac{1}{4}$

$1\frac{3}{8} x=1\frac{1}{4}$

$x=1\frac{1}{4} :1\frac{3}{8}$

$x=\frac{5}{4} :\frac{11}{8}= \frac{5*8}{4*11} =\frac{10}{11}$

$x=\frac{10}{11}$

3}

$7\frac{4}{9} *x+1\frac{2}{3} =7\frac{1}{4}$

$7\frac{4}{9} *x =7\frac{1}{4} -1\frac{2}{3}$

$7\frac{4}{9} *x =6\frac{15}{12} -1\frac{8}{12}$

$7\frac{4}{9} *x =5\frac{7}{12}$

$x =5\frac{7}{12} :7\frac{4}{9}$

$x =\frac{67}{12} :\frac{67}{9}=\frac{9}{12}=\frac{3}{4}$

$x =\frac{3}{4}$

4)

$15\frac{4}{5} x-2\frac{2}{3} =3\frac{5}{6}$

$15\frac{4}{5} x=2\frac{2}{3} +3\frac{5}{6}$

$15\frac{4}{5} x=2\frac{4}{6} +3\frac{5}{6}$

$15\frac{4}{5} x=5\frac{9}{6}$

$15\frac{4}{5} x=6\frac{1}{2}$

$x=6\frac{1}{2} :15\frac{4}{5}$

$x=\frac{13}{2} :\frac{79}{5}=\frac{13*5}{2*79}=\frac{65}{158}$

$x=\frac{65}{158}$