Răspuns
Explicație pas cu pas:
[(27-m) ×9:3]+108×7=900-84
[(27-m) ×9:3]+108×7=816
[(27-m) ×9:3]+756=816
[(27-m) ×9:3]=816-756
[(27-m) ×9:3]=60
[(27-m) ×3]=60
27-m=60:3
27-m=20
m=27-20
m=7
