Решите уравнения:
1)x
_________=8/9
1/3-5/6
2)x+8/15
_________= -20
1/6-4/15
3)y+3/8
_________=4/7
7/20-7/8
4)3/4+y
________= -9
5/6-8/9
1)x
_________=8/9
1/3-5/6
2)x+8/15
_________= -20
1/6-4/15
3)y+3/8
_________=4/7
7/20-7/8
4)3/4+y
________= -9
5/6-8/9
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Answers & Comments
x/(2-5)/6=8/9
x/(-3/6)=8/9
x=(-3/6)•8/9
x=-3•8)/6•9
x=-4/3
2)x+8/15=-20•(1/6-4/15)
x+8/15=-20•(5-8)/30
x+8/15=20•3/30
x+8/15=2
x=2-8/15
x=(30-8)/15
x=22/15