Cine mă poate ajuta repedee? va rog mult cine scrie primul bine și corect îi dau coroana!!!!Va roggg multt​

Răspuns:

Explicație pas cu pas:

1. 6978+1487=8465

2018-1309=709

769x58=46168

31661:7=4523

2. 5046-x=1994

x=5046-1994

x=3052

3219+X=9294

X=9294-3219

X=6075

3.a=1088

b=1808

b e mai mare cu : 1808-1088=720

4.a+b+6=34

a+b=34-6

a+b=28

52+28=80

5. 6x9+5=

54+5=59(numarul)

[56-(18x6-540:5)x9]:7=

[56-(108-108)x9]:7=

(56-0x9):7=

(56-0):7=

56:7=

8

7. 744+908+1022=2674(dublul sumei)

2674:2=1337(suma)

1337-1022=315(andrei)

744-315=429(sofia)

908-315=593(darius)

8. a+b+c=20604

ax3=b

b-45=c

a+a+a+a+(a+a+a-45)=20604

7xa=20604-45

7xa=20559

a=20559:7

a=2934

b=2934x3=8802

c=8802-45=8757

9.suma lui mihai=a

suma lui ana=b

a+b=201

b=(5xa)/8+32

inlocuim b cu (5xa)/8+32 in a+b=201

a+(5xa)/8=201-32

a+(5xa)/8=169

8xa/8 + 5xa/8 = 169

(8xa+5xa)=169x8

13xa=1352

a=1352/13=104

b=(5xa)/8+32=(5x104)/8+32=520/8+32=65+32=97

proba:97+104=201

Răspuns:

1. a) 6978+1487=8465

b) 2018-1309=709

c) 769×58=46168

d) 31661:7=4523

2. a) 5046-x=1994

x=5046-1994

x=3052

5046-3052=1994

b) 3219+x=9294

x=9294-3219

x=6075

3219+6075=9294

3. a=1088 b=1808

a>b 1088-1808=720

a e mai mare decât b cu 720

4. a+b+6=34

15+13+6=34

52+a+b=?

52+15+13=80

5. 6×9+5=59

59:6=9 rest 5

6. [56-(18×6-540:5)×9]:7=8

1) 18×6=108

2) 540:5=108

3) 108-108=0

4) 0×9=0

5) 56-0=56

6) 56:7=8

7. S+A=744

A+D=908

S+D=1022

(S+A+D)×2=744+908+1022

(S+A+D)×2=2674

S+A+D=1337

D=1337-744=593

S=1337-908=429

A=1337-1022=315

8. x,y,z=20604

y=3x

y=z-45

x+3x+z=20604

3x=z-45

4x+z=20604

3x-z= -45

7x=20559

x=2937

3×2937-z= -45

z=8856

y=3×2937

y=8811

9. Pe scurt:

Mihai=104 lei Ana=97 lei