Question

[(x: 5+9):7+7] x 3 – 25 = 5
{[(a - 2): 3 - 1]: 2-1} : 2 = 1

Answer 1

Răspuns:

[(x:5+9):7+7]x3-25=5

[(x:5+9):7+7]X3=5+25

[(x:5+9):7+7]X3=30

[(x:5+9):7+7]=30:3

[(x:5+9):7+7]=10

(x:5+9):7=10-7

(x:5+9):7=3

(x:5+9)=3x7

(x:5+9)=21

x:5=21-9

x:5=12

x=12x5

x=60

{[(a-2):3-1]:2-1}:2=1

{[(a-2):3-1]:2-1}=1x2

{[(a-2):3-1]:2-1}=2

{[(a-2):3-1]:2}=2+1

{[(a-2):3-1]:2}=3

[(a-2):3-1]=3x2

[(a-2):3-1]=6

[(a-2):3]=6+1

[(a-2):3]=7

(a-2)=7x3

(a-2)=21

a=21+2

a=23