Question

a) 27:[26+(6×a-7×3):9]+(13-2×2×3)=2
b) [1140-(5045:a-909)]:130=400:50

VĂ ROG E URGENTTTTT!!!!!! ARĂTAȚI-MI CUM SE FACEEE!! DAU COROANĂĂĂ!!!!!​

Answer 1

Explicație pas cu pas:

a) 27:[26+(6×a-7×3):9]+(13-2×2×3)=2

27:[26+(6a-21):9]+(13-12)=2

27:[26+(6a-21):9]+1=2

27:[26+(6a-21):9]=2-1

27:[26+(6a-21):9]=1

26+(6a-21):9=27:1

26+(6a-21):9=27

(6a-21):9=27-26

(6a-21):9=1

6a-21=1x9

6a-21=9

6a=9+21

6a=30

a=30:6

a=5

b) [1140-(5045:a-909)]:130=400:50

[1140-(5045:a-909)]:130=8

[1140-(5045:a-909)]=8x130

1140-(5045:a-909)=1040

1140-1040=5045:a-909

100=5045:a-909

100+909=5045:a

1009=5045:a

a=5045:1009

a=5