Question

Tìm x

-5 - ( 24 - x ) = 12 +( 42- 65 )

Giúp mk với :'(

Answer 1

-5 - (24 - x ) = 12 + (42-65)

\(\Leftrightarrow\) -5-24-x = 12+42-65

\(\Leftrightarrow\) x - 29 = -11

\(\Leftrightarrow\) x = -11+29

\(\Leftrightarrow\) x = 18

Answer 2

a,-5 - (24 - x ) = 12+(42-65 )

-> -5 - (24-x) = 12+ ( -23)

-> -5 - (24-x) = -11

-> - (24-x) = -11 - 5

->- (24-x) = -16

->24-x = 16

-> x = 18

Vậy x = 18

Answer 3

-5 - (24 - x ) = 12+(42-65 )

-> -5 - (24-x) = 12+ ( -23)

-> -5 - (24-x) = -11

-> - (24-x) = -11 - 5

->- (24-x) = -16

->24-x = 16

-> x = 18

Answer 4

Cách 1:Dùng quy tắc chuyển vế

\(-5-\left(24-x\right)=12+\left(42-65\right)\)

\(-5-\left(24-x\right)=12+\left(-23\right)\)

\(-5-\left(24-x\right)=-11\)

\(-\left(24-x\right)=-11+5\)

\(-\left(24-x\right)=-6\)

\(24-x=6\)

\(x=24-6\)

\(x=18\)

Vậy \(x=18\)

Cách 2:Tính thông thường

\(-5-\left(24-x\right)=12+\left(42-65\right)\)

\(-5-\left(24-x\right)=12+\left(-23\right)\)

\(-5-\left(24-x\right)=-11\)

\(24-x=-5-\left(-11\right)\)

\(24-x=6\)

\(x=24-6\)

\(x=18\)

Vậy \(x=18\)