Question

pls rezolvatimi ex asta COROANA REZOLVATIL PRIN METODA DE CLASA A 4A

Answer 1

a) 27:[26+(6×a-7×3):9]+(13-2×2×3)=2
27:[26+(6×a-21):9]+(13-4×3)=2
27:[26+(6×a-21):9]+(13-12)=2
27:[26+(6×a-21):9]+1=2
27:[26+(6×a-21):9]=2-1
27:[26+(6×a-21):9]=1
26+(6×a-21):9=27:1
26+(6×a-21):9=27
26+(6×a-21)=27×9
26+(6×a-21)=243
6×a-21=243-26
6×a-21=217
6×a=217+21
6×a=238
a=238:6
a=39,(6)