\(a,x+1=35:7+5\)

\(\Leftrightarrow x+1=10\)

\(\Leftrightarrow x=9\)

\(b,x:3=45:5\)

\(\Leftrightarrow x:3=9\)

\(\Leftrightarrow x=27\)

hok tốt!

a) \(x+1=35:7+5\)

\(\Rightarrow x+1=5+5\)

\(\Rightarrow x+1=10\)

\(\Rightarrow x=10-1\)

\(\Rightarrow x=9\)

Vậy x = 9

b) \(x:3=45:5\)

\(\Rightarrow x:3=9\)

\(\Rightarrow x=9\times3\)

\(\Rightarrow x=27\)

Vậy x = 27

_Chúc bạn học tốt_

1, x+1 = 35:7+5

x+1=5+5

x+1=10

x=10-1

Vậy x =9

2, x:3=45:5

x:3=9

x=9×3

x=27

Vậy x=27

A

A

A

    \(x+x+x+81=-3-x\)

⇔\(4x=-84\)

⇔\(x=-21\)

`x xx 95 + x + x : 0,25 = 7963`

`x xx (95 + 1 + 4) = 7963`

`x xx 100 = 7963`

`=> x = 79,63`.

\(x\times\left(95+1+4\right)=7963\)

\(100\times x=7963\)

\(x=79,63\)

\(=>x\left(95+1+4\right)=7963\)

\(x=\dfrac{7963}{95+1+4}=\dfrac{7963}{100}=79,63\)

`x xx95+x+x:0,25=102,34`

`x xx95+x+x xx4=102,34`

`x xx(95+1+4)=102,34`

`x xx100=102,34`

`x=102,34:100=1,0234`

`x xx 95 + x + x :0,25 = 102,34`

`x xx 95 + x + x xx 4 = 102,34`

`x xx ( 95+1+4)=102,34`

`x xx 100 = 102,34`

`x = 102,34 : 100`

`x = 1,0234`

`x xx95+x+x:0,25=102,34`

`x xx(95+1+4)=102,34`

`x xx100=102,34`

`x=102,34:100`

`x=1,0234`

x(x+1)-(x-1)(x+2)=8

\(\Leftrightarrow\)\(x^2+x-x^2-2x+x+2=8\)

\(\Leftrightarrow0x=6\left(ptvn\right)\)

\(\Rightarrow S=\varnothing\)

`x:0,25+x:0,5+x+x xx93=24,6`

`x xx4+x xx2+x+x xx93=24,6`

`x xx(4+2+1+93)=24,6`

`x xx100=24,6`

`x=24,6:100`

`x=0,246`