3/7+4/8+2/7+10/8 0,5х+14-3,3х=4,7х-28 1/75+11/25-3/50+4/25 Полное решение прошу 1 и 3...

Question

3/7+4/8+2/7+10/8

0,5х+14-3,3х=4,7х-28

1/75+11/25-3/50+4/25
Полное решение прошу 1 и 3 ДРОБИ

Answer 1

3/7 + 4/8 + 2/7 + 10/8 = (3/7 + 2/7) + (4/8 + 10/8) = 5/7 + 14/8 = 5/7 + 1 6/8 = 5/7 + 1 3/4 = 20/28 + 1 21/28 = 1 41/28 = 2 13/28.

0,5х + 14 - 3,3х = 4,7х - 28
- 2,8х + 14 = 4,7х - 28
14 + 28 = 4,7х + 2,8х
42 = 7,5х
х = 42 : 7,5
х = 5,6.

1/75 + 11/25 - 3/50 + 4/25 = 1/75 + 0,44 - 0,06 + 0,16 = 1/75 + 0,54 = 1/75 + 54/100 = 1/75 + 27/50 = 2/150 + 81/150 = 83/150. 

Answer 2

3/7+4/8+2/7+10/8=2 13/18
1)3/7+2/7=5/7
2)4/8+10/8=14/8=1 6/8=1 3/4
3)5/7+1 3/4=20/28+1 21/28=1 41/28=2 13/28
0,5x+14-3,3x=4,7x-28
0,5x-3,3x-4,7x=-28-14
-7,5=-42:(-7,5)
x=5,6
Ответ:5,6
1,75+11/25-3/50+4/25
1,75+0,44-0,06+0,16=2,29