Question

 

A) (x+45)-54=0

B) 12(x+9)=36 

C) 5^2x=25

 

Answer 1

a, \(x+45=54\Leftrightarrow x=9\)

b, \(x+9=3\Leftrightarrow x=-6\)

c, \(5^{2x}=5^2\Rightarrow2x=2\Leftrightarrow x=1\)

Answer 2

\(a,\left(x+45\right)-54=0\\ \Rightarrow x+45=54\\ \Rightarrow x=9\\ b,12\left(x+9\right)=36\\ \Rightarrow x+9=3\\ \Rightarrow x=-6\\ c,5^{2x}=25\\ \Rightarrow5^{2x}=5^2\\ \Rightarrow2x=2\\ \Rightarrow x=1\)

Answer 3

a)x+45=54=>x=9

b)x+9=3=>x=-6

c)x=1

Chúc em học tốt

Answer 4

a)(x+45)-54=0

<=>x+45-54=0

<=>x-9=0

<=>x=9

b)12(x+9)=36

<=>x+9=3

<=>x=-6

c)\(5^{2x}=25\)

<=>\(5^{2x}=5^2\)

<=>2x=2

<=>x=1

Answer 5

a)(x+45)-54=0

    x+45       =54

    x             =9

b)12(x+9)=36

        x+9=3

        x=-6

c)\(5^{2x}=25\)

  \(5^{2x}=5^2\)

\(\Rightarrow2x=2\)

     x=1

Answer 6

a) => x + 45 = 0 + 54

    => x + 45 = 54

    => x = 54 - 45

    => x = 9

b) => x + 9 = 36 : 12

    => x + 9 = 3

    => x = 3 - 9

    => x = -6

c) => 5^2x = 5²

    => 2x = 2

    => x = 1

Answer 7

A x+45=54

x=9

B 12x+108=36

12x=-72

x=6

C 5^2x=5²

\(\Rightarrow\)2x=2

x=1