Question

Помогите пожалуйста!!!

Answer 1

53,76:(4,248-1,56х)+3,8=56
53,76:(4,248-1,56х)=56+3,8
53,76:(4,248-1,56х)=59,8
4,248-1,56х=53,76:59,8
4,248-1,56х=0,899
1,56х=4,248-0,899
1,56х=3,349
х=2,147

(2,7у+3,08у):1,7-3,08=12,22
5,78у :1,7=12,22+3,08
5,78у :1,7=15,3
5,78у=15,3*1,7
5,78у=26,01
у=4,5

15 5/8 :(2 3/4 х +5 5/6) -1 1/2=3/4
15 5/8 :(2 3/4 х +5 5/6)=3/4+1 1/2
15 5/8 :(2 3/4 х +5 5/6)=2 1/4
2 3/4 х +5 5/6=15 5/8 : 2 1/4
2 3/4 х +5 5/6=125/8 * 4/9
2 3/4 х +5 5/6=6 17/18
2 3/4 х=6 17/18 - 5 5/6
2 3/4 х=1 1/9
х=1 1/9 : 2 3/4
х=10/9 * 4/11
х=40/99

3 1/3 -(4 1/5 х+х):5 4/7=8/15
(4 1/5 х+х):5 4/7=3 1/3 - 8/15
5 1/5 х :5 4/7=2 4/5
5 1/5 х=2 4/5 * 5 4/7
5 1/5 х=78/5
х=78/5 : 5 1/5
х=78/5 * 5/26
х=3