Question

Exercitiile 7 si 8.Multumesc! Coroana!

Answer 1

584 - 9 x a = 476
584 - ( 9 x a ) = 476
9 x a = 584 - 476
9 x a = 108
a = 108 : 9
a = 12
584 - 9 x 12 = 476
584 - ( 9 x 12 ) = 476

266 : 7 + 979 : 3 - b = 102
( 266 : 7 ) + ( 979 : 3 ) - b = 102
38 + 326 rest 1 - b = 102
38 + 326 + 1 - b = 102
364 + 1 - b = 102
365 - b = 102
b = 365 - 102
b = 263
266 : 7 + 979 : 3  - 263 = 102
( 266 : 7 ) + ( 979 : 3 ) - 263 = 102

Answer 2

7. 584-9a=476
584-476=9a
108=9a
a=108:9
a=12

acest exercitiu nu se poate face, deoarece 979:3 nu apartine |N, atunci am inlocuit 979 cu 978
266:7+978:3-b=102
38+326-b=102
364-b=102
b=364-102
b=262

c:9+96×8-653=843
c:9+768=843+653
c:9=1496-768
c=728×9
c=6552

d-73×15+809-954:6=802
d-1095+809-159=802
d-445=802
d=802+445
d=1247

8. Î=9
C=9
r<Î =》r<9 =》 r={1,2,3,4,5,6,7,8}
D=Î×C+r
D=9×9+r
D=81+1
81+2
81+3
....................
81+8
D={82,83,84,85,86,87,88,89}

Sper ca te-am ajutat! :))