Question

cat se poate de repede si cat puteti

Va roog!!!!!

Dau coroana​

Answer 1

Răspuns:

Explicație pas cu pas:

l

1)

B

2)

A

3)

D

4)

C

-

-

ll

a= numaratorul

b= numitorul

a= b-4

2xa / (b+1) =1

2xa= b+1

b= a+4

2a=a+4+1

2a-a=5

a= 5

-

b= a+4

b= 5+4

b=9

-

Fractia este : 5/9

-

-

2)

X= suma de bani a a Mariei

Y= suma de bani a Anei

a= Ana

m= Maria

-

a-a/6= 2*(m+a/6)

a-a/6=2m+2a/6+a/6

a= 2m+3a/6

a= 2m+a/2

2a=4m+a

2a-a= 4m

a= 4m

-

a+m/10=m-m/10+96

¹⁰⁾m+¹⁰⁾96=¹⁰⁾a+2m/10

10m+960=10a+2m

10a= 4*10=40m

10m+960=40m+2m

960=40m+2m-10m

960=32m

m= 960:32

m= 30 lei (Maria)

a= 4*m

a=4*30= 120 lei (Ana)

-

120+30= 150 lei (impreuna )

-

3)

a= primul nr

b= al doilea nr

1/a+1/b= 5/6

1/a-1/b= 1/6

1/a+1/a+1/b-a/b = 5/6+1/6

2/a=6/6

2a=1

a= 2

-

³ᵇ⁾1/2+⁶⁾1/b= ᵇ⁾5/6

3b+6=5b

5b-3b= 6

2b=6

b= 6:2

b= 3

-

a=2

b=3

a+b=2+3=5

axb= 2x3=6