Question

1)Efectuati
8+{2+[5+5×12+(7×6+13)]-15}

2) efectuati
6x+(3+5)x-9x
3)se stie ca a+b +c =11CALCULATI 10a +10b +10c-109

Answer 1

1. 8+{2+[5+5x12+(7x6+13)]-15}
8+{2+[5+5x12+(42+13)]-15}
8+[2+(5+5x12+55)-15]
8+[2+(5+60+55)-15]
8+[2+(65+55)-15]
8+(2+120-15)
8+(122-15
8+107=115