Question

va rooooooooooooooooooog ca habar n am

Answer 1

Răspuns:

11. L = 40 si l = 20

12. a = 42 b = 7

13. a = 3 b=2

a = 6 b = 4

a = 9 b = 6

a = 12 b = 8

Explicație pas cu pas:

11. P = 2L + 2l = 120 => 2(L + l) = 120 => L+l = 60

L : l = 2 => L = 2l

=> 2l + l = 3l = 6 => l = 60 :3 = 20

=> L = 2 * 20 = 40

12.

a - b = 35

a : b = 6 => a = 6b

=> a - b = 35  dar a = 6b => 6b - b = 35 => 5b = 35

b = 35 : 5

b = 7

a = 6b = 6 * 7 = 42

13. (a + b) : (a -b) = 5 => a + b = 5 * (a-b) => a + b = 5a - 5b => 6b = 4a / :2 => 3b = 2a

b = $\frac{2}{3}$ * a

cautam solutii: a = 3 b=2

a = 6 b = 4

a = 9 b = 6

a = 12 b = 8

https://youtube.com/c/Rezolvam