Question

2x{27-2x[3xa-(35:5-2x3)]+3}:4=10

Answer 1

Răspuns:

Explicație pas cu pas:

2 × { 27 - 2 × [ 3 × a - ( 35 : 5 - 2 × 3 ) ] + 3 } : 4 = 10

2 × { 27 - 2 × [ 3 × a - ( 7 - 6 ) ] + 3 } = 10 × 4

2 × [ 27 - 2 × ( 3 × a - 1 ) + 3 ] = 40

27 - 2 × ( 3 × a - 1 ) + 3 = 40 : 2

27 - 2 × ( 3 × a - 1 ) + 3 = 20

27 - 2 × ( 3 × a - 1 ) = 20 - 3

27 - 2 × ( 3 × a - 1 ) = 17

2 × ( 3 × a - 1 ) = 27 - 17

2 × ( 3 × a - 1 ) = 10

3 × a - 1 = 10 : 2

3 × a - 1 = 5

3 × a = 5 + 1

3 × a = 6

a = 6 : 3

a = 2