Question

Îmi trebuie urgent, va rog frumos! ​

Answer 1

Răspuns:

Explicație pas cu pas:

a = 5/6

b = 2/9

a + b = 5/6 + 2/9 = 15/18 + 4/18 = 19/18

a - b = 5/6 - 2/9 = 15/18 - 4/18 = 11/18

____________

a = 13/6

a + b = 3

b = 3 - 13/6 = 18/6 - 13/6 = 5/6

a - b = 13/6 - 5/6 = 8/6

______________

a = 7/8

a - b = 1/2

b = 7/8 - 1/2 = 7/8 - 4/8 = 3/8

a + b = 7/8 + 3/8 = 10/8 = 5/4

______________

b = 3/10

a + b = 2

a = 2 - 3/10 = 20/10 - 3/10 = 17/10

a - b = 17/10 - 3/10 = 14/10 = 7/5

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b = 13/12

a - b = 2/3

a = 2/3 + 13/12 = 8/12 + 13/12 = 21/12

a + b = 21/12 + 13/12 = 34/12 = 17/6