Question

27÷[26+(6×5-7×a)÷9]=1 a=? VA ROG!!!

Answer 1

27:[26+(6×5-7×a):9]=1
27:[26+(30-7×a):9]=1
[26+(30-7×a):9]=27:1
[26+(30-7×a):9]=27
[(30-7×a):9]=27-26
[(30-7×a):9]=1
(30-7×a)=1×9
(30-7×a)=9
7×a=30-9
7×a=21
a=21:7
a=3

Answer 2

Răspuns

a = 3

Explicație pas cu pas:

27:[26+(6×5-7×a):9]=1

26+(30-7×a) :9= 27 : 1

26+(30-7×a):9= 27

( 30 - 7 x a) : 9 - 27 - 26

( 30 - 7 x a ) : 9 = 1

30 - 7 x a = 1 x 9

30 - 7 x a = 9

7 x a = 30 - 9

7 x a = 21

a = 21 : 7

a = 3