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бротишечкакрут
@бротишечкакрут
August 2022
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гюйс
Verified answer
1)
1/3х+1/х=4/15 (общий знамен. 15х)
5+15=4х
4х=20
х=20:4
х=5
1/(3*5)+1/5=4/15
1/15+3/15=4/15
2)
1/х - 1/7х=2/7 (общ. 7х)
7-1=2х
2х=6
х=3
1/3 - 1/(7*3)=2/7
7/21 - 1/21=6/21=2/7
3)
1/4х +1/х=5/16
4+16=5х
5х=20
х=4
1/16+1/4=5/16
1/16+4/16=5/16
4)
1/х -1/9х =2/9
9-1=2х
2х=8
х=4
1/4 - 1/36=2/9
9/36 - 1/36=8/36=2/9
5)
1/8х +1/х=3/8
1+8=3х
3х=9
х=3
1/24+1/3=3/8
1/24+8/24=9/24=3/8
6)
1/х -1/5х=2/15
15 - 3=2х
2х=12
х=6
1/6 - 1/30=2/15
5/30 - 1/30=4/30=2/15
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Answers & Comments
Verified answer
1)1/3х+1/х=4/15 (общий знамен. 15х)
5+15=4х
4х=20
х=20:4
х=5
1/(3*5)+1/5=4/15
1/15+3/15=4/15
2)
1/х - 1/7х=2/7 (общ. 7х)
7-1=2х
2х=6
х=3
1/3 - 1/(7*3)=2/7
7/21 - 1/21=6/21=2/7
3)
1/4х +1/х=5/16
4+16=5х
5х=20
х=4
1/16+1/4=5/16
1/16+4/16=5/16
4)
1/х -1/9х =2/9
9-1=2х
2х=8
х=4
1/4 - 1/36=2/9
9/36 - 1/36=8/36=2/9
5)
1/8х +1/х=3/8
1+8=3х
3х=9
х=3
1/24+1/3=3/8
1/24+8/24=9/24=3/8
6)
1/х -1/5х=2/15
15 - 3=2х
2х=12
х=6
1/6 - 1/30=2/15
5/30 - 1/30=4/30=2/15