194 - 24 : (12 : 3 x x -3) -25 = 145

194 - 24 : (4 x x -3) -25 = 145

24 : (4 x x -3) = 194 - 145 + 25

24 : (4 x x -3) = 24

4 x x -3 = 24 : 24

4 x x -3 = 1

4 \(\times\)x = 1 + 3

4 \(\times\)x = 4

x = 4 : 4

x = 1

$169-24:(4 x \text{x} -3)=145$

$24:(4 x \text{x}-3)=24$

$4 x \text{x}-3=1$

$4 x \text{x}=4$

$\text{x}=1$

Vậy $\text{x}=1$

`194 - 24 : (12 : 3 x xx -3) -25 = 145`

`24 : (4 xx x-3) = 194-(145+25)`

`24 : (4 xx x-3) = 24`

`4 xx x -3 = 1`

`4 xx x=1+3`

`4 xx x=4`

`x=4:4`

`x=1`.

Cô Hoài ơi, cô trả lời tin nhắn em với ạ!

a, (-25) + 276 - (276 - 25)

= (-25) + 276 - 276 + 25

= [ (-25) + 25] - (276 - 276)

= 0 - 0

 = 0

b, 24 x 46 + 24 x 53 + 24 

= 24 x ( 46 + 53 + 1)

= 24 x 100

= 2400

c, 145 + 20 - 45 + 180

= (145 - 45) + (20 + 180)

= 100 + 200

= 300

d; 12 x 36 + 12 x 65 - 12

= 12 x ( 36 + 65  - 1)

= 12 x (100)

= 1200

B)

194−24:(12:3×x−3)−25=145

⇔194−24:(4×x−3)=145+25

⇔194−24:(4×x−3)=170

⇔24:(4×x−3)=194−170

⇔24:(4×x−3)=24

⇔4×x−3=24:24

⇔4×x−3=1

⇔4×x=1+3

⇔4×x=4

⇔x=4:4

 ⇔x=1

Vậyx=1

Trả lời:

\(194-24\div\left(44x-3\right)-25=145\)

\(\Leftrightarrow194-24\div\left(44x-3\right)=170\)

\(\Leftrightarrow24\div\left(44x-3\right)=24\)

\(\Leftrightarrow44x-3=1\)

\(\Leftrightarrow44x=4\)

\(\Leftrightarrow x=\frac{1}{11}\)

Vậy \(x=\frac{1}{11}\)

\(x\times\frac{1}{3}\div\frac{2}{9}-x\div5=1\frac{2}{5}\)

\(\Leftrightarrow x\times\frac{1}{3}\times\frac{9}{2}-x\times\frac{1}{5}=\frac{7}{5}\)

\(\Leftrightarrow x\times\frac{3}{2}-x\times\frac{1}{5}=\frac{7}{5}\)

\(\Leftrightarrow x\times\left(\frac{3}{2}-\frac{1}{5}\right)=\frac{7}{5}\)

\(\Leftrightarrow x\times\frac{13}{10}=\frac{7}{5}\)

\(\Leftrightarrow x=\frac{14}{13}\)

Vậy \(x=\frac{14}{13}\)

lp 5 chua hoc 4x moi chi hoc 44 *  x thui nha!

194-24:(44×x-3)=145+25

194-24:(44×x-3)=170

24:(44×x-3)=194-170

24:(44×x-3)=24

(44×x-3)=24:24

(44×x-3)=1

44×x=1+3

44×x=4

x=4:44

x=1/11

vậy x=1/11

\(\left(x.7-7\right)\left(x.12+24\right)=0\)

=> \(\orbr{\begin{cases}x.7-7=0\\x.12+24=0\end{cases}}\)

=> \(\orbr{\begin{cases}7x=7\\12x=-24\end{cases}}\)

=> \(\orbr{\begin{cases}x=1\\x=-2\end{cases}}\)

\(170-\left(4+5x\right)=101\)

=> \(4+5x=170-101\)

=> \(4+5x=69\)

=> \(5x=69-4\)

=> \(5x=65\)

=> \(x=65:5=13\)

(x.7-7).(x.12+24)=0

* x.7-7=0                                  * x.12+24=0

x.7=7                                           x.12=24

   x=7:7                                            x=24:12

   x=1                                                x=2

vạy x=1 hoặc x=2

170-(4+5x)=101

4+5x=170-101

4+5x=69

5x=69-4

5x=65

  x=65:5

  x=13

vậy x=13

250:(2x-4)=145-120

250:(2x+4)=25

2x+4=250:25

2x+4=10

2x=10+4

2x=14

  x=14:2

  x=7

vậy x=7

6.x+3.x-4.x=105

x.(6+3-4)=105

x.(9-4)=105

x.5=105

   x=105:5

   x=21

vậy x=21

1) (x.7 - 7)(x.12 + 24) = 0

(7x - 7)(12x + 24) = 0

7x - 7 = 0 hoặc 12x + 24 = 0

7x = 0 + 7          12x = 0 - 24

7x = 7                 12x = -24

x = 1                    x = -2

Vậy: x = 1 hoặc x = -2

2) 170 - (4 + 5x) = 101

170 - 4 - 5x = 101

-5x + 166 = 101

-5x = -65

x = 13

3) 250 : (2x - 4) = 145 - 120

250 : (2x - 4) = 25

125 = 25(x - 2)

125 : 25 = x - 2

5 = x - 2

5 + 2 = x

7 = x

x = 7

4) 6.x + 3.x - 4.x = 105

5.x = 105

x = 105 : 5

x = 21

b: =2376-376+3425-42

=2000+3383

=5383

c: =3145-145+246+4246+2347-347

=3000+2000+4492

=9492

e: =(72-72):A=0

1: \(=-145\cdot13+145\cdot57+57\cdot10-57\cdot145=-1315\)

2: \(=17\cdot15-17\cdot16+16\cdot17-16\cdot20=255-320=-65\)

3: \(=-38\cdot25+38\cdot4-25\cdot4+25\cdot38=13\cdot4=52\)

4: \(=23\cdot145-23\cdot17-145\cdot23+145\cdot6=479\)

5: \(=24\cdot15-24\cdot4+4\cdot24-4\cdot15=360-60=300\)

6: \(=199\left(15-17+17-5\right)=199\cdot10=1990\)

7: \(=-39\cdot5+39\cdot99+99\cdot10-99\cdot39=795\)

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