Răspuns:
71
Explicație pas cu pas:
54:9×5:5×7+(12:3×9-7)=
54:9×5:5×7+(4×9-7)=
54:9×5:5×7+(36-7)=
54:9×5:5×7+29=
6×5:5×7+29=
30:5×7+29=
6×7+29=
42+29=
=6x5:5x7+(4x9-7)
=30:5x7+29
=6x7+29
42+29
=71
