Răspuns :
Răspuns:
a×9:5+234:3=105
a×9:5+78=105
a×9:5=105-78
a×9:5=27
a×9=27×5
a×9=135
a=135:9
a=15
[(a×9):5+234]:3=105
(a×9):5+234=105×3
(a×9):5+234=315
(a×9):5=315-234
(a×9):5=81
a×9=81×5
a×9=405
a=405:9
a=45
Răspuns:
a×9:5+234:3=105
a×9:5+78=105
a×9:5=105-78
a×9:5=27
a×9=27×5
a×9=135
a=135:9
a=15
[(a×9):5+234]:3=105
(a×9):5+234=105×3
(a×9):5+234=315
(a×9):5=315-234
(a×9):5=81
a×9=81×5
a×9=405
a=405:9
a=45