ta có 460+85.4=(x-200):4 

<->460+340=(x-200):4

<-> 800=(x-200):4

<->800.4=x-200

->x=3200+200=3400

=3000 mới đúng

460+85x4=x+175:5+30

460+340=x+35+30

800=x+65

800-65=x

735=x hay x = 135

460 + 85.4 = ( x + 200 ) : 4 

460 + 340 = ( x + 200 ) : 4 

800 = ( x + 200 ) : 4 

x + 200 = 3200

=> x = 3000

460 - 85 x 4 = ( X + 200 ) : 4

460 + 340 = (X + 200 ) : 4

     800      = ( X + 200 ) : 4

     X + 200 = 3200

     X           = 3200 - 200

     X            = 3000

\(460+85.4=\)\(\left(x+200\right).4\)

\(460+340=\left(x+200\right).4\)

     \(800\)      \(=\left(x+200\right).4\)

\(\Rightarrow\left(x+200\right).4=800\)

      \(\left(x+200\right)\) \(=800:4\)

        \(x+200\)     \(=200\)

       \(x\)                     \(=200-200\)

      \(x\)                      \(=0\)

Vậy x = 0

5^x = 125

x = 3

460 + 340 = (x + 200) : 4

800 = (x + 200) : 4

x + 200 = 800 : 4

x + 200 = 200

x = 200 - 200

x = 0

Hội con 🐄 chúc bạn học tốt!!!

460 + 340 = (x+200):4

8--=(x+200):4

x+200=800:4

x+200=200

x=200-200

x=0

5^x=125

x=3

\(460+85.4=\left(x+200\right):4\)

\(\Rightarrow\left(x+200\right):4=460+85.4\)

\(\Rightarrow\left(x+200\right):4=460+340\)

\(\Rightarrow\left(x+200\right):4=800\)

\(\Rightarrow\left(x+200\right)=800.4\)

\(\Rightarrow x+200=3200\)

                  \(x=3200-200\)

                    \(x=3000\)

          Vậy \(x=3000\)

b) \(5^x=125\)

\(\Rightarrow5^x=5^3\)

Cơ số giống nhau suy ra số mũ giống nhau 

\(\Rightarrow x=3\)

Vậy \(x=3\)

Chúc bạn học tốt !!!

dài quá ko làm nha!!!

a) 460 + 85 * 4 = ( x + 200 ) * 4

460 + 340 = ( x + 200 ) * 4

800 = ( x + 200 ) * 4

x + 200 = 200

x = 0

b) x + 5 * 2 - ( 32 + 16 * 3 : 16 - 15 ) = 0

x + 10 - ( 32 + 3 - 15 ) 0

x + 10 - 20 = 0

x - 10 = 0

x = 10

a) \(460+85.4=\left(x+200\right).4\)

\(\Rightarrow460+340=4x+800\)

\(\Rightarrow-4x=800-460-340\)

\(\Rightarrow-4x=0\)

\(\Rightarrow x=0\)

Vậy x = 0

b) \(x+5.2-\left(32+16.3:16-15\right)=0\)

\(\Rightarrow x+10-\left(32+3-15\right)=0\)

\(\Rightarrow x+10-20=0\)

\(\Rightarrow x-10=0\)

\(\Rightarrow x=10\)

Vậy x = 10

a, \(460+85.4=\left(x+200\right)4\)

\(460+340=\left(x+200\right)4\)

\(800=\left(x+200\right)4\)

\(\Leftrightarrow x+200=\frac{800}{4}\)

\(\Leftrightarrow x+200=200\)

\(\Rightarrow x=200-200\)

\(\Rightarrow x=0\)

Vậy \(x=0\)

a. 5(x+35)=515

=> x+35=515:5

=> x+35=103

=> x = 103-35

=> x = 68

b. (x+40).15=75.12

=>(x+40).15=900

=>x+40=900:15

=>x+40=60

=>x=60-40

=>x=20

c.460+85.4=(x+200):4

=>460+340=(x+200):4

=>800=(x+200):4

=>800.4=x+200

=>3200=x+200

=>x=3200-200

=>x=3000

5(x+35)=515

x+35=515/5

x+35=103

x=103-35

x=68

còn câu tính nhanh nữa giải dùm mình đi

a: \(\Leftrightarrow5x-42=251\)

=>5x=293

hay x=293/5

b: \(\Leftrightarrow20-x=20\)

hay x=0

c: \(\Leftrightarrow x-4300-\dfrac{1}{50}=4250\)

\(\Leftrightarrow x=\dfrac{427501}{50}\)

d: =>(x+200):4=460-340=120

=>x+200=480

hay x=280

e: =>5+15(x+1)=500-480=20

=>15(x+1)=15

=>x+1=1

hay x=0