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папапапа65
@папапапа65
August 2022
2
8
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Решите уравнения:
а) х : 2,1 = 1/3 : 0,35
б) х : 7/8=2/3 : 7/9
в) 3 1/12 : х = 5 4/7 : 18/37
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Answers & Comments
aloynuchka
А) х:2,1=1/3:0,35
х:2 1/10=1/3 : 35/100
х:2 1/10= 1/3 :7/20
х:2 1/10=20/21
х= 20/21 *2 1/10
х= 20/21*21/10
х=2
б)х:7/8=2/3:7/9
х:7/8=6/7
х=6/7*7/8
х=3/4
в) 3 1/12 :х=5 4/7 :18/37
37/12:х=39/7 : 18/37
37/12 : х=1443/126
х= 37/12 : 1443/126
х=7/26
4 votes
Thanks 10
Radion1996
Решаем все по свойству пропорцииа)0,35х=2,1*1/30,35х=0,7х=2б)7/9х=2/3*7/87/9х=7/12х=7/12:7/9х=3/4в)39/7х=37/12*18/3739/7х=3/2х=3/2:39/7х=7/26
2 votes
Thanks 2
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Answers & Comments
х:2 1/10=1/3 : 35/100
х:2 1/10= 1/3 :7/20
х:2 1/10=20/21
х= 20/21 *2 1/10
х= 20/21*21/10
х=2
б)х:7/8=2/3:7/9
х:7/8=6/7
х=6/7*7/8
х=3/4
в) 3 1/12 :х=5 4/7 :18/37
37/12:х=39/7 : 18/37
37/12 : х=1443/126
х= 37/12 : 1443/126
х=7/26