Question

\(2\left(x+55\right)=60\)

\(12x-33=3^{2015}:3^{2014}\)

tìm x 

Answer 1

a. x+55=30

x=30-55

x=-25

b. 12x-33=3

12x=3+33

12x=36

x=3

Answer 2

\(2\left(x+55\right)=60\)

\(x+55=60:2\)

\(x+55=30\)

\(x=30-55\)

\(x=-25\)

vậy \(x=-25\)

\(12x-33=3^{2015}:3^{2014}\)

\(12x-33=3^{2015-2014}\)

\(12x-33=3\)

\(12x=36\)

\(x=3\)

vậy \(x=3\)

Answer 3

   Giải :

a ) \(2\left(x+55\right)=60\)

        \(\left(x+55\right)=60\div2\)

        \(\left(x+55\right)=30\)

                          \(x=30-55\)

                          \(x=-25\)

Vậy \(x=-25\)

b ) \(12x-33=3^{2015}\div3^{2014}\)

     \(12x-33=3\)

                 \(12x=3+33\)

                 \(12x=36\)

                       \(x=36\div12\)

                       \(x=3\)

Vậy \(x=3\)

Answer 4

Ukm! Mấy bạn kia làm đúng rồi đó^_^

Answer 5

a) \(2\cdot\left(x+55\right)=60\)

\(\Rightarrow x+55=60:2\)

\(\Rightarrow x+55=30\)

\(\Rightarrow x=30-55\)

\(\Rightarrow x=-25\)

b) \(12x-33=3^{2015}:3^{2014}\)

\(\Rightarrow3\cdot\left(4x-11\right)=3^{2015-2014}\)

\(\Rightarrow3\cdot\left(4x-11\right)=3\)

\(\Rightarrow4x-11=3:3\)

\(\Rightarrow4x-11=1\)

\(\Rightarrow4x=11+1\)

\(\Rightarrow4x=12\)

\(\Rightarrow x=12:4\)

\(\Rightarrow x=3\)

Answer 6

Ukm!Mấy bạn làn đúng rồi đó^_^

Answer 7

2 ( x + 55 ) = 60                                                            

x + 55 = 60 / 2                                                               

x + 55 = 30

x = 30 - 55

x = -25

Answer 8

2(x+55)=60

  (x+55)=60:2

   x+55 =30

   x       =30-55

   x       = -25

12x-33=3²⁰¹⁵:3²⁰¹⁴

12x-33=3^2015-2014

12x-33=3¹

12x     =3+33

12x     =36

    x     =36:12

    x     =3

Answer 9

a, 

2(x+55)=60

   (x+55)=60:2

   (x+55)=30

     x       =30-55

     x=\(-\)25

b,

12x-33=3²⁰¹⁵\(\div\)3²⁰¹⁴

12x-33=3

12x=3\(+\)33

12x =36

     x=36\(\div\)12

     x=3