Question

[(b + 5) x 5 + 5] x 5 + 5 = 2052
8 x [708 - 4x (n : 2 x 5 – 24 x 2:6)] = 4 480
3. 840 : 4 + [68: 2 + 4 x (20 + fx 15)] = 564
Repede va rog!! Imi trebuie la ora 13:50​

Answer 1

Răspuns:

[(b + 5) x 5 + 5] x 5 + 5 = 205

[(b + 5) x 5 + 5] x 5 =205-5

[(b+5)x5+5]x5=200

[(b+5)x5+5]=200:5

(b+5)x5+5=40

(b+5)x5=40-5

(b+5)x5=35

(b+5)=35:5

b+5=7

b=7-5

b=2

8 x [708 - 4x (n : 2 x 5 – 24 x 2:6)] = 4 480

[708 - 4x (n : 2 x 5 – 24 x 2:6)]=4480:8

708 - 4x (n : 2 x 5 – 24 x 2:6)=560

4x (n : 2 x 5 – 24 x 2:6)=708-560

4x (n : 2 x 5 – 24 x 2:6)=148

(n:2x5-48:6)=148:4

(n:2x5-8)=37

n:2x5=37+8

n:2x5=45

n:2=45:5

n:2=9

n=9x2

n=18

840 : 4 + [68: 2 + 4 x (20 + fx 15)] = 564

210+[34+4x(20+fx15)]=564

[34+4x(20+fx15)]=564-210

34+4x(20+fx15)=354

4x(20+fx15)=354-34

4x(20+fx15)=320

(20+fx15)=320:4

20+fx15=80

fx15=80-20

fx15=60

f=60:15

f=4