Question

PLS AM NEVOIE PANA MAINE DAU COROANA SI MA ABONEZ! ​

Answer 1

Răspuns:

4.

a+b=42

74-c=42

c=42

(b+c):2=28

b+c=56

74-a=56

a=18

b=42-a=42-18=24

5.

b) (a+b):2=28

a+b=56

(c+d+e):3=58

c+d+e=174

(a+b+c+d+e):5=(56+174):5=230:5=46

c) x+y+z=45

45+49=94:2=47

x+y+z+49:4=46

x+y+z=44+45+46=135:3=45

44+45+46+49:4=184:4=46

6.

b) (10+10+10+9+7):5=9?

46:5=9,2 Ms

(10+10+10+9+7+x):6=9

46+x=54

x=54-46

x=8

7.

Numerele cautate sunt 197 si 199.

198*2=396

396:2=198 (n)

198-1=197 (n-1)

198+1=199 (n+1)