Question

Afla necunoscută 5+6×7-8×(y-9)-76÷2=1

Answer 1

Răspuns:

5+42-8•(y-9)-38=1

47-8•(y-9)-38=1

9-8•(y-9)=1

8•(y-9)=9-1

8•(y-9)=8

y-9=1

y=10

Answer 2

5+6×7-8×(y-9)-76:2=1

5+6×7-8×(y-9)-38=1

5+42-8×(y-9)=38+1

5+42-8×(y-9)=39

42-8×(y-9)=39-5

42-8×(y-9)=34

8×(y-9)=42-34

8×(y-9)=8

(y-9)=8:8

(y-9)=1

y=9+1

y=10