6+[15-(8:a×7+7)]×5=8:(1×4)+3×3
Răspunsuri la întrebare
Răspuns:
Explicație pas cu pas:
6 + [ 15 - ( 8 : a × 7 + 7 ) ] × 5 = 8 : ( 1 × 4 ) + 3 × 3
6 + [ 15 - ( 8 : a × 7 + 7 ) ] × 5 = 8 : 4 + 9
6 + [ 15 - ( 8 : a × 7 + 7 ) ] × 5 = 2 + 9
6 + [ 15 - ( 8 : a × 7 + 7 ) ] × 5 = 11
[ 15 - ( 8 : a × 7 + 7 ) ] × 5 = 11 - 6
[ 15 - ( 8 : a × 7 + 7 ) ] × 5 = 5
15 - ( 8 : a × 7 + 7 ) = 5 : 5 = 1
8 : a × 7 + 7 = 15 - 1 = 14
8 : a × 7 = 14 - 7
8 : a × 7 = 7
8 : a = 7 : 7
8 : a = 1
a = 8 : 1
a = 8 → numarul, aflat prin metoda mersului invers
Răspuns:
Explicație pas cu pas:
6+[15-(8:a×7+7)]×5=8:(1×4)+3×3
6+[15-(8:a×7+7)]×5=8: 4 + 9
6+[15-(8:a×7+7)]×5= 2 + 9
6+[15-(8:a×7+7)]×5= 11
[15-(8:a×7+7)]×5 = 11-6
[15-(8:a×7+7)]×5 = 5
[15-(8:a×7+7)] = 5 : 5
15-(8:a×7+7) = 1
8:a×7+7= 15-1
8:a×7+7 = 14
8: a x7 = 14-7
8: ax7 = 7
8:a = 7: 7
8:a =1
a= 8:1
a= 8