6 чисел:
122
212
221
311
113
131
23/12=1 11/12
38/7=5 3/7
48/17=2 14/17
87/20=4 7/20
2/9 к знаменателю 27
2/9=2х3/9х3=6/27
Ответ:6/27
<span>-3x=-21
X=7
20x =-5
X=-0,25
8x+5=0
8x=-5
X=-5÷8
X=-0,625
3x-7=2
3x=2+7
3x=9
X=3
11-4x=2x
-4x-2x=-11
-6x=-11
X=-11/6
8x-2=7+2x
8x-2x=7+2
6x=9
X=9/6
3x+(4-6x)=18
3x+4-6x=18
-3x=14
X=-14/3
</span>
27 : 4 = 6,75
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