Надите корни уравнений 8x+11цел2/11=15. 4x-19цел3/5=23. {8цел4/9-x}:20=7/40....

Question

Надите корни уравнений 8x+11цел2/11=15. 4x-19цел3/5=23. {8цел4/9-x}:20=7/40. 44:{x-9цел3/4}=1цел9/13. Срочно!!!!!!

Answer 1

8х+11 2/11=15
8х=15 - 11 2/11
8х=3 9/11
х=3 9/11 : 8
х=42/11 * 1/8
х=21/44

.
4х - 19 3/5=23
4х=23+19 3/5
4х=42 3/5
х=42 3/5 : 4
х=213/5 * 1/4
х=213/20
х=10 13/20

.
(8 4/9 - х:20=7/40
8 4/9 - х=7/40 * 20
8 4/9 - х=7/2
х=8 4/9 - 3 1/2
х=8 8/18 - 3 9/18
х=4 17/18

.
44:(х-9 3/4)=1 9/13
х - 9 3/4=44 : 1 9/13
х - 9 3/4=44 * 13/22
х - 9 3/4=26
х=26+9 3/4
х=35 3/4