Question

Решите уравнение:
17 8/25-(18-h)=7 18/25
1 21/70-7x/70+30/70=1 23/70

Answer 1

17 8/25-(18-h)=7 18/25
18-h=17 825-7 1825
18-h=16 3325-7 1825
18-h=9 1525
h=18-9 1525
h=17 2525-9 1525
h=8 1025
h=8 25

1 21/70-7x/70+30/70=1 23/70
-7x70=1 2370-1 2170-3070
-7x70=-2870
x=-2870*(-707)
x=4

Answer 2

18-h=17 8/25-7 18/25
18-h=16 25/25+8/25-7 18/25
18-h=16 33/25-7 18/25
18-h=9 15/25
18-h=9 3/5
h=18-9 3/5
h=17 5/5-9 3/5
h=8 2/5

91/70-7х/70+30/70=93/70/*70
91-7х+30=93
-7х=93-91-30
-7х= -28
х= -28:(-7)
х=4