Question

[21-(17×6-816:x)-3]:7=21 repede dau coroana

Answer 1

Răspuns:

[21-(17×6-816:x)-3]:7=21

21-(17×6-816:x)-3=21·7

21-(102-816:x)=147+3

-(102-816:x)=150-21

816:x)=129+102

816:x=231

x=816:231

x=3,532

Answer 2

[ 21 - ( 17 × 6 - 816 : x ) - 3 ] : 7 = 21

[ 21 - ( 102 - 816 : x ) - 3 ] : 7 = 21

21 - ( 102 - 816 : x ) - 3 = 21 × 7

21 - ( 102 - 816 : x ) - 3 = 147

21 - ( 102 - 816 : x ) = 147 + 3

21 - ( 102 - 816 : x ) = 150

102 - 816 : x = 21 - 150

102 - 816 : x = - 129

816 : x = 102 - ( - 129 )

816 : x = 231

x = 816 : 231

x = 3, 5324