Question

tìm x

\(x+10=50-20\)

b) \(x+10-5=20+20\)

Answer 1

a)x+10=30

=>x=20

b)x+10-5=20+20

x+10-5=40

x+10=45

=>x=35

Answer 2

x + 10 = 50 - 20

x + 10 = 30

x = 20 

x + 10 - 5 = 20 + 20

x + 5 = 40

x = 35 

Answer 3

\(x+10=50-20\)

\(x+10=30\)

\(x=30-10\)

\(x=20\)

\(x+10-5=20+20\)

\(x+5=40\)

\(x=40-5\)

\(x=35\)

Answer 4

x=20

b)x=55

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Answer 5

\(x+10=50-20\)

\(x+10=30\)

           \(x=30-10\)

           \(x=20\)

\(x+10-5=20+20\)

\(x+10-5=40\)

\(x+10=40+5\)

\(x+10=45\)

          \(x=45-10\)

          \(x=35\)

Answer 6

a) x + 10 = 30

   x          = 30 - 10

   x          =  20. Vậy x=20.

b)  x+10-5 = 40

     x          = 40 +5 -10 

     x         =     35. Vậy x= 35

Answer 7

\(x+10=50-20\)

 \(x+10=30\)

                \(=30-10\)

                  \(=20\)

b) \(x+10-5=20+20\)

    \(x+10-5=40\)

    \(x+10=40+5\)

     \(x+10=45\)

                \(x=45-10\)

                 \(x=35\)

tchs mik tchs lại

Answer 8

x+10=30

     x=30-10

     x=20

b)x+10-5=20+20

  x+10-5=40

     x+10=40+5

     x+10=45

           x=45-10

           x=35

Answer 9

x + 10 = 50 - 20

x + 10 = 30

x = 30 - 10

x = 20

x + 10 - 5 = 20 + 20

x + 10 - 5 = 40

x  = 40 + 5 - 10

=> x = 35

Answer 10

a,x+10=30=)x=30-10=20

b,x+10-5=40=)x+5=40=)x=40-5=35