Question

Tìm x :

15 - (x-7)=-21

Answer 1

15-(x-7)=-21

x-7=15+21

x-7=36

x=36+7

x=43

ủng hộ mk nhé

Answer 2

15-(x-7)=-21

      x-7=15-(-21)

      x-7=36

      x   =36+7

      x=43

Ủng hộ mk nha ^...^ 

Answer 3

15 - ( x - 7 ) = -21

x - 7 = 15 - ( -21 )

x - 7 = 15 + 21

x - 7 = 36

x = 36 + 7

x = 43

nha bạn                                                                           ^_^

Kids Jonh

Answer 4

15-(x-7)=-21

      x-7=15-(-21)

      x-7=36

      x   =36+7

      x   =43

T ủng hộ mk nhé ^...^ ^_^

Answer 5

\(15-\left(x-7\right)=-21\)

            \(x-7=15-\left(-21\right)\)

            \(x-7=36\)

             \(x=36+7\)

             \(x=43\)

Answer 6

\(15-\left(x-7\right)=-21\)

\(\Rightarrow x-7=15-\left(-21\right)\)

\(\Rightarrow x-7=36\)

\(\Rightarrow x=43\)

                 t nha