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Belissima1
a fost răspuns

5×[8×(7x-16)-17]-16=99

Răspuns :

Raluk81
5×[8×(7x-16)-17]-16= 99
5×[8×(7x-16)-17]= 99+16
5×[8×(7x-16)-17]= 115
8×(7x-16)-17= 115:5
8×(7x-16)-17= 23
8×(7x-16)= 23+17
8×(7x-16)= 40
7x-16= 40:8
7x-16= 5
7x= 5+16
7x= 21
x= 21:7
x= 3

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