Question

1,2si 3,repede vă roooooog​

Answer 1

Răspuns:

1. x = 1

2. 3/5

3. 2/5

Explicație pas cu pas:

1.2/ 3 = x / 2.5

x = 2.5*1.2 / 3

x = 2.5*0.4

x = 1

2.

b = 3a

(3a + 2b) / 5b =

(3a + 2*3a) / 5*3a =

(3a + 6a) / 15a =

9a/15a =

9/15 =

3/5

3*(4a+5b) = 9*5b

12a + 15b = 45b

12a = 30b

a = 30/12 * b

a = 5/2 * b

a/b = (5/2 * b) / b = 5/2 / 1 = 2/5