Question

tìm x

(7-x)-(25+7)=-25

Answer 1

Trl :

Ko chắc 

\(\left(7-x\right)-\left(25-7\right)=-25\)

\(\Rightarrow\left(7-x\right)-18=-25\)

\(\Rightarrow\left(7-x\right)=-25+18\)

\(\Rightarrow7-x=-7\)

\(\Rightarrow x=7-\left(-7\right)\)

\(\Rightarrow x=0\)

Answer 2

đúng rồi. thanks

Answer 3

(7-x)-(25+7)=-25

(7-x)-32      =-25

7-x             =-25+32

7-x             = +(32-25)

7-x             = 7

   x             =7-7

   x             = 0

Vậy x = 0