Question

aflati x daca b) 3*{6*[5*(2x+34)-248]+12}=252

Answer 1

Răspuns:  x = 24

Explicație pas cu pas:

3 × { 6 × [ 5 × ( 2x + 4 ) - 248 ] + 12} = 252

6 × [ 5 × ( 2x + 4 ) - 248 ] + 12 = 252 : 3

6 × [ 5 × ( 2x + 4 ) - 248 ] + 12 = 84

6 × [ 5 × ( 2x + 4 ) - 248 ] = 84 - 12

6 × [ 5 × ( 2x + 4 ) - 248 ] = 72

5 × ( 2x + 4 ) - 248 = 72 : 6

5 × ( 2x + 4 ) - 248 = 12

5 × ( 2x + 4 ) = 12 + 248

5 × ( 2x + 4 ) = 260

2x + 4 = 260 : 5

2 x + 4 = 52

2 x = 52 - 4

2 x = 48

x = 48 : 2

x = 24 → numărul, aflat prin metoda mersului invers