Question

II. Aflati valoarea lui , a":
6866+{36x24-[64: (5xa+7)+653]}x15=10001

VA ROG E URGENT ​

Answer 1

Răspuns:  a = 5

Explicație pas cu pas:

6 866 + { 36 x 24 - [ 64 : ( 5 x a + 7 ) + 653 ] } x 15 = 10 001

{ 864 - [ 64 : ( 5 x a + 7 ) + 653 ] } x 15 = 10 001 - 6 866

{ 864 - [ 64 : ( 5 x a + 7 ) + 653 ] } x 15 =  3 135

864 - [ 64 : ( 5 x a + 7 ) + 653 ]  = 3 135 : 15

864 - [ 64 : ( 5 x a + 7 ) + 653 ]  = 209

64 : ( 5 x a + 7 ) + 653 = 864 - 209

64 : ( 5 x a + 7 ) + 653 = 655

64 : ( 5 x a + 7 ) = 655 - 653

64 : ( 5 x a + 7 ) = 2

5 x a + 7 = 64 : 2

5 x a + 7 = 32

5 x a = 32 - 7

5 x a = 25

a = 25 : 5

a = 5 → numarul, aflat prin metoda mersului invers

Answer 2

6866 + { 36 × 24 - [ 64 : ( 5 × a + 7 ) + 653 ] } × 15 = 10001

6866 + { 864 - [ 64 : ( 5 × a + 7 ) + 653 ] } × 15 = 10001

864 - [ 64 : ( 5 × a + 7 ) + 653 ] × 15 = 10001 - 6866

864 - [ 64 : ( 5 × a + 7 ) + 653 ] × 15 = 3135

864 - [ 64 : ( 5 × a + 7 ) + 653 ] = 3135 : 15

864 - [ 64 : ( 5 × a + 7 ) + 653 ] = 209

64 : ( 5 × a + 7 ) + 653 = 864 - 209

64 : ( 5 × a + 7 ) + 653 = 655

64 : ( 5 × a + 7 ) = 655 - 653

64 : ( 5 × a + 7 ) = 2

5 × a + 7 = 64 : 2

5 × a + 7 = 32

5 × a = 32 - 7

5 × a = 25

a = 25 : 5

a = 5