Răspuns :

1) a=3b+10

a+b+3+10=143

a+b=130

3b+10+b=130

4b=120

b=30

a=30×3+10

a=90+10=100

2) D:î=11, r=7=>D=11î+7

D+î=115

11î+7+î=115

12î+7=115

12î=115-7

12î=108

î=108:12

î=9

D+9=115

D=106

106:9=11

r=7

3) a+b=32

a:b=3=>a=3b+4

3b+4+b=32

4b=28=>b=7

a=7,3+4

a=25

4) a+b=44

a:b=2 rest 8

a=?

b=?

a......+8

b......cu 44

44-8=36

36:3=12

12×2+8=32

5) a:b=9 rest 8

a=9b+8

9b+8+b=98

10b=90

b=9

6) 1+2+3+4+5+6+7+8+9+10=55

7) a:b=4 rest 4

a+b=84

a=4b+4

4b+4+b=84

5b=84-4

5b=80

b=80:5

b=16

a=4×16+4

a=64+4

a=68

8) a-b=955

a:b=5 rest 3 =>a=5b+3

5b+3-b=955

4b+3=955

4b=955-3

4b=952

b=952:4

b=238

a=5×238+3

a=1193

SPER CĂ TE-AM AJUTAT!!COROANA?