Răspuns :
Răspuns:
( 2× 3 + d ) - ( 7 × 9 + 6 ) = 7 × 7
( 2 × 3 + d ) - ( 7 × 9 + 6 ) = 49
( 2 × 3 + d ) - ( 63 + 6 ) = 49
( 2 × 3 + d ) - 69 = 49
2 × 3 + d = 49 + 69
2× 3 + d = 118
6 + d = 118
d = 118 - 6
d = 112
Răspuns:
( 2× 3 + d ) - ( 7 × 9 + 6 ) = 7 × 7
( 2 × 3 + d ) - ( 7 × 9 + 6 ) = 49
( 2 × 3 + d ) - ( 63 + 6 ) = 49
( 2 × 3 + d ) - 69 = 49
2 × 3 + d = 49 + 69
2× 3 + d = 118
6 + d = 118
d = 118 - 6
d = 112