Răspuns :
3 × ( 2 x × 5 ) + 19 = 82
3 × ( 2 x × 5 ) = 82 - 19
3 × ( 2 x × 5 ) = 63
2 x × 5 = 63 : 3
2 x × 5 = 21
2 x = 21 : 5
2 x = 4, 2
x = 4, 2 : 2
x = 2, 1
Răspuns:
Explicație pas cu pas:
3 × ( 2x × 5 ) + 19 = 82
3 × ( 10x ) + 19 = 82
3 × 10x + 19 = 82
30x + 19 = 82
30x = 82 - 19
30x = 63
x = 63 / 30
x = 21 / 10