\(-\left(-100\right)+5.\left(x+17\right)=185\\ 100+5.\left(x+17\right)=185\\ 5.\left(x+17\right)=185-100\\ 5.\left(x+17\right)=85\\ x+17=85:5\\ x+17=17\\ x=17-17\\ x=0\)

185 < a < 200

=> a = 186 ; 187 ; 188 ; 189

Xét 4 trường hợp ta có :

1) 5 + x = 186

x = 181

2) 5 + x = 187

x = 182

3) 5 + x = 188

x = 183

4) 5 + x = 189

x = 184

đề kiểu j vậy bn???

5 + x = 185,200

x = 185,2 - 5

x = 180,2

`185:0,25+185×95+185`

`=185×4+185×95+185×1`

`=185×(4+95+1)`

`=185×100`

`=18500`

`#Bao`

18500

= 185 x 4 + 185 x 95 + 185 x 1

= 185 x ( 4 + 95 + 1 )
= 185 x 100

= 18500

x * ( 5 + 185 ) = 5510

x * 190 = 5510

x = 5510 : 190

x = 29

5 * x * 6 = 8 x 15

5 * x * 6 = 120

5 * 6 * x = 120

30 * x = 120

x = 120 : 30

x = 40

x X (5+185) = 5510

x X 190 = 5510

x= 5510 : 190

x= 29

----------------------------------------

5 X x X 6 = 8 X 15

30 X x = 120

x= 120: 30

x=4

x . (5 + 185) = 5510

x . 190 = 5510

x = 5510 : 190 

x = 29

5.x.6 = 8 . 15

30. x = 120

x = 120 : 30

x = 40

   \(185:0,25+185\) x \(95+185\)

\(=185\) x \(4+185\) x \(95+185\) x \(1\)

\(=185\) x \(\left(4+95+1\right)\)

\(=185\) x \(100=18500\)

haizz 
mk củng ko biết

a) \(x+215=480\)

\(x=480-215\)

\(x=265\)

b) \(725-x=185:5\)

\(725-x=37\)

\(x=725-37\)

\(x=688\)

c) \(x\times\dfrac{1}{3}+x\times\dfrac{4}{3}=\dfrac{2}{3}\)

\(x\times\left(\dfrac{1}{3}+\dfrac{4}{3}\right)=\dfrac{2}{3}\)

\(x\times\dfrac{5}{3}=\dfrac{2}{3}\)

\(x=\dfrac{2}{3}:\dfrac{5}{3}=\dfrac{2}{3}\times\dfrac{3}{5}\)

\(x=\dfrac{2}{5}\)

d) \(\left(\dfrac{13}{5}+\dfrac{2}{3}\right):x=5\)

\(\dfrac{49}{15}:x=5\)

\(x=\dfrac{49}{15}:5=\dfrac{49}{15}\times\dfrac{1}{5}\)

\(x=\dfrac{49}{75}\)

a)x + 215 = 480 

x = 480 - 215 

x = 265 

b) 725 - x = 185 : 5 

    725 - x = 37

              x = 725 - 37 

             x = 688

c, \(x\) \(\times\) \(\dfrac{1}{3}\) + \(x\) \(\times\) \(\dfrac{4}{3}\) = \(\dfrac{2}{3}\)

    \(x\) \(\times\)( \(\dfrac{1}{3}\) + \(\dfrac{4}{3}\)) = \(\dfrac{2}{3}\)

    \(x\) \(\times\) \(\dfrac{5}{3}\)          = \(\dfrac{2}{3}\)

    \(x\)                  = \(\dfrac{2}{3}\) : \(\dfrac{5}{3}\)

    \(x\)                  = \(\dfrac{2}{5}\)

d, (\(\dfrac{13}{5}\) + \(\dfrac{2}{3}\)) : \(x\) = 5

     \(\dfrac{49}{15}\) : \(x\)        = 5

             \(x\)           = \(\dfrac{49}{15}\) : 5

              \(x\)         = \(\dfrac{49}{75}\)

Ta có: 5+x=185

=>x=185-5

=>x=180

=> x= 185-5

=>x =180

ok nha bạn