Ответ:
Пошаговое объяснение:
6)7/8y=5/4
y=5/4*8/7
y=5*2/7
y=10/7
y=1 3/7
7) 31/15-3/4m=59/60
31*2/60 - 3*15m/60=59/60
62-45m=59
-45m=59-62
-45m=-3
m=1/15
8)(3/14+5x/21):3/7=13/4
(3*3/42+5*2x/42):3/7=13/4
(9/42+10x/42):3/7=13/4
(9+10x)/42 * 7/3=13/4
(9+10x)/18=13/4
2*(9+10x)/36=13*9/36
18+20x=117
20x=117-18
20x=99
x=4.95
9) 4*2y/60 + 3*15/60=5*10/60
8y+45=50
8y=50-45
8y=5
y=5/8
10) 29/14-5x/3=26/21
29*3/42- 5*14x/42=2*26/21
87-70x=52
-70x=52-87
-70x=-35
x=2
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Answers & Comments
Ответ:
Пошаговое объяснение:
6)7/8y=5/4
y=5/4*8/7
y=5*2/7
y=10/7
y=1 3/7
7) 31/15-3/4m=59/60
31*2/60 - 3*15m/60=59/60
62-45m=59
-45m=59-62
-45m=-3
m=1/15
8)(3/14+5x/21):3/7=13/4
(3*3/42+5*2x/42):3/7=13/4
(9/42+10x/42):3/7=13/4
(9+10x)/42 * 7/3=13/4
(9+10x)/18=13/4
2*(9+10x)/36=13*9/36
18+20x=117
20x=117-18
20x=99
x=4.95
9) 4*2y/60 + 3*15/60=5*10/60
8y+45=50
8y=50-45
8y=5
y=5/8
10) 29/14-5x/3=26/21
29*3/42- 5*14x/42=2*26/21
87-70x=52
-70x=52-87
-70x=-35
x=2