2) (2 1/10-x) / 8 + 1 2/15 = 1 1/3 3) 4 1/6 / (1/4 * x + 1 4/15) - 1 5/6 = 2/3

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Математика

Мишака

14 июня, 01:34

2) (2 1/10-x) / 8 + 1 2/15 = 1 1/3 3) 4 1/6 / (1/4 * x + 1 4/15) - 1 5/6 = 2/3

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Федосия · Answer 1

2) (2 1/10-x) / 8 + 1 2/15 = 1 1/3

(2 1/10-x) / 8 = 1 1/3 - 1 2/15

(2 1/10-x) / 8 = 1 5/15 - 1 2/15

(2 1/10-x) / 8 = 3 / 15

(2 1/10-x) / 8 = 1/5

2 1/10-x=1/5*8

2 1/10-x=8/5

2 1/10-x=1 3/5

х=2 1/10-1 3/5

х=2 1/10-1 6/10

х=1 1/10-6/10

х=1-5/10

х=5/10

х=1/2

3) 4 1/6 / (1/4 * x + 1 4/15) - 1 5/6 = 2/3

4 1/6 / (1/4 * x + 1 4/15) = 2/3+1 5/6

4 1/6 / (1/4 * x + 1 4/15) = 4/6+1 5/6

4 1/6 / (1/4 * x + 1 4/15) = 1 9/6

4 1/6 / (1/4 * x + 1 4/15) = 2 3/6

4 1/6 / (1/4 * x + 1 4/15) = 2 1/2

1/4 * x + 1 4/15=4 1/6: 2 1/2

1/4 * x + 1 4/15=25/6: 5/2

1/4 * x + 1 4/15=25/6*2/5

1/4 * x + 1 4/15=5/6*2/1

1/4 * x + 1 4/15=5/3*1/1

1/4 * x + 1 4/15=1 2/3

1/4 * x = 1 2/3 - 1 4/15

1/4*х=1 10/15 - 1 4/15

1/4*х=6/15

1/4*х=2/5

х=2/5:1/4

х=2/5*4/1

х=8/5

х=1 3/5