Question

k)32-3×[15-2×(16-36:a)]-10=1​

Answer 1

Răspuns:  a = 3

Explicație pas cu pas:

k)

32 - 3 × [ 15 - 2 × ( 16 - 36 : a ) ] - 10 = 1

​32 - 3 × [ 15 - 2 × ( 16 - 36 : a ) ] = 1 + 10

32 - 3 × [ 15 - 2 × ( 16 - 36 : a ) ] = 11

3 × [ 15 - 2 × ( 16 - 36 : a ) ] = 32 - 11

3 × [ 15 - 2 × ( 16 - 36 : a ) ] = 21

15 - 2 × ( 16 - 36 : a ) = 21 : 3

15 - 2 × ( 16 - 36 : a ) = 7

2 × ( 16 - 36 : a ) = 15 - 7

2 × ( 16 - 36 : a ) = 8

16 - 36 : a = 8 : 2

16 - 36 : a = 4

36 : a = 16 - 4

36 : a = 12

a = 36 : 12

a = 3 → numarul, aflat prin metoda mersului invers

------------------------------------------------------------------------------

Verific:

32 - 3 × [ 15 - 2× ( 16 - 36 : 3 ) ] - 10 = 1

= 32 - 3 × ( 15 - 2 × 4 ) - 10 =

= 32 - 3 × 7 - 10 =

= 32 - 21 - 10 =

= 11 - 10 =

= 1