Question

$afla \: valoarea \: lui \: a \: 5 + (16 - (9 \div a \times 8 + 7)) \times 6 = 4 \div (1 \times 2) + (3 \times 3)$
​

Answer 1

Răspuns:

5+[16-(9:a·8+7)]·6=4:2+9

5+[16-(9:a·8+7)]·6=2+9

5+[16-(9:a·8+7)]·6=11

[16-(9:a·8+7)]·6=11-5

16-(9:a·8+7)=6:6

9:a·8+7=16-1

9:8·a=15-7

8·a=9·8

a=72:8

a=9