Question

Tìm x thuộc N biết :

X - 105 : 21 = 25

Answer 1

x - 105 : 21 = 25

105 : 21 = 5

=> x = 25 + 5

x = 30 

Answer 2

x - 105 : 21 = 25

105 : 21 = 5

=> x = 25 + 5

x = 30

Answer 3

\(x-105:21=25\)

\(\Leftrightarrow x-\left(105:21\right)=25\)

\(\Leftrightarrow x-5=25\)

\(\Leftrightarrow x=25+5\)

\(\Leftrightarrow x=30\)

Answer 4

x-105:21=25

x-5=25

x=25+5

x=30 

chúc bn hok tốt

Answer 5

x-105:21=25

x-105=21.25

x-105=525

x=525+105

x=  630

Answer 6

\(x-105:21=25\)

\(\Rightarrow x-5=25\)

\(\Rightarrow x=25+5=30\)

Answer 7

X - 105 : 21 = 25

X -      5       = 25

X                 = 25 + 5

X                 = 30

Vậy x => 30