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[ 78 * 12 - 39 * 24 ] / [ 456 * 68 + 532 / 68] = 0

`@` `\text {Ans}`

`\downarrow`

\(5^{x-2}-3^2=2^4-\left(6^8\div6^6-6^2\right)\)

`\Rightarrow`\(5^x\div5^2-9=16-\left(6^2-6^2\right)\)

`\Rightarrow`\(5^x\div5^2-9=16\)

`\Rightarrow`\(5^x\div5^2=25\)

`\Rightarrow`\(5^x=5^2\cdot5^2\)

`\Rightarrow`\(5^x=5^4\Rightarrow x=4\)

Vậy, `x = 4.`

5ˣ⁻² - 3² = 2⁴ - (6⁸ : 6⁶ - 6²)

5ˣ⁻² - 9 = 16 - (36 - 36)

5ˣ⁻² - 9 = 16

5ˣ⁻² = 16 + 9

5ˣ⁻² = 25

5ˣ⁻² = 5²

x - 2 = 2

x = 2 + 2

x = 4

5x−2−32=24−(68÷66−62)

$\Rightarrow$5�÷52−9=16−(62−62)5x÷52−9=16−(62−62)

$\Rightarrow$5�÷52−9=165x÷52−9=16

$\Rightarrow$5�÷52=255x÷52=25

$\Rightarrow$5�=52⋅525x=52⋅52

$\Rightarrow$5�=54⇒�=45x=54⇒x=4

Vậy, $x=4.$

\(n\times68-24\times n-n\times34=100\)

           \(n\times\left(68-24-34\right)=100\)

                                      \(n\times10=100\)

                                                 \(n=100:10\)

                                                 \(n=10\)

Vậy \(n=10\)

n x 68 - 24 x n - n x 34 = 100
 n x (68-24-34)             = 100
 n x 10                          = 100
 n                                 = 100:10
 n                                 = 10
Vậy n=10

n = 10

tk mình nha! Điểm mình thấp lắm

\(x-68:69-\left(48-24.2:6-3\right)=0\)

\(x-\frac{68}{69}-\left(48-8-3\right)=0\)

\(x-\frac{68}{69}-37=0\)

\(x-\frac{68}{69}=37\)

\(x=\frac{2621}{69}\)

x - 68 : 69 - (48 - 24 * 2 : 6 - 3) = 0

x - 68 : 19 - 48 + 24 x 2 : 6 + 3 = 0 

x - 68 : 19 - 48 + 24 x 2: 6 = 0 + 3 

x - 68 : 19 - 48 + 24 x 2: 6 = 3

x - 68 : 19 - 48 + 24 x 2 = 3 x 6

x - 68 : 19 - 48 + 24 x 2 = 18

x - 68 : 19 - 48 + 24 = 18 : 2 

x - 68 : 19 - 48 + 24 = 9 

x - 68 : 19 - 48 = 9 - 24 

x - 68 : 19 - 48 = -15

x - 68 : 19 = ( - 15 ) + 48 

x - 68 : 19 = 33

x - 68 = 33 x 19

x - 68 = 627

x = 627 + 68 

x = 695

k cho mik nha làm ơn đi mn

1. \(x-8+32=68\)

\(x-8=68-32\)

\(x-8=36\)

\(x=36+8\)

\(x=44\)

_____

2. \(x+8+32=68\)

\(x+8=68-32\)

\(x+8=36\)

\(x=36-8\)

\(x=28\)

_____

3. \(98-x+34=43\)

\(98-x=43-34\)

\(98-x=9\)

\(x=98-9\)

\(x=89\)

_____

4. \(98+x-34=43\)

\(98+x=43+34\)

\(98+x=77\)

\(x=77-98\)

\(x=-21\)

_____

5. \(x:5:4=800\)

\(x:5=800.4\)

\(x:5=3200\)

\(x=3200.5\)

\(x=16000\)

_____

6. \(18+x=384:8\)

\(18+x=48\)

\(x=48-18\)

\(x=30\)

_____

7. \(\left(84,6-2\times x\right):3,02=5,1\)

\(84,6-2.x=5,1.3,02\)

\(84,6-2.x=15,402\)

\(2.x=84,6-15,402\)

\(2.x=69,198\)

\(x=69,198:2\)

\(x=34,599\)

_____

8. \(x\times5=120:6\)

\(x.5=20\)

\(x=20:5\)

\(x=4\)

_____

9. \(\left(15\times24-x\right):0,25=100:0,25\)

\(\left(15.24-x\right):0,25=400\)

\(15.24-x=400.0,25\)

\(15.24-x=100\)

\(360-x=100\)

\(x=360-100\)

\(x=260\)

1,x-8+32=68

=>x-8=68-32=36

=>x=36+8=42

2,x+8+32=68

=>x+8=68-32=36

=>x=36-8=28

3,98-x+34=43

=>98-x=43-34=9

=>x=98-9=89

4,98+x-34=43

=>98+x=43+34=77

=>x=77-98=-21

5,x:5:4=800

=>x:20=800

=>x=800x20=16000

6,18+x=384:8=48

=>x=48-18=30

7,(84,6-2x):3,02=5,1

=>84,6-2x=5,1x3,02=15,402

=>2x=84,6-15,402=69,198

=>x=69,198:2=34,599

8,5x=120:6=20

=>x=20:5=4

9,(15x24-x):0,25=100:0,25=400

=>360-x=400x0,25=100

=>x=360-100=260.

1. \(...\Rightarrow x+24=68\Rightarrow x=68-24=44\)

2. \(...\Rightarrow x+40=68\Rightarrow x=68-40=28\)

3. \(...\Rightarrow3^{2\left(8+x\right)}=9=3^2\Rightarrow2\left(8+x\right)=2\Rightarrow8+x=1\Rightarrow x=-7\)

4. \(...\Rightarrow3^{2\left(8+x\right)}=77\) (bạn xem lại đề)

5. \(...\Rightarrow x:5=800.4\Rightarrow x:5=3200\Rightarrow x=3200.5=16000\)

6. \(...\Rightarrow18+x=48\Rightarrow x=48-18=30\)

7. \(...\Rightarrow84,6-2x=5,1.3,02=15,402\Rightarrow2x=84,6-15,402\Rightarrow2x=69,198\Rightarrow x=34,599\)

8. \(...\Rightarrow5.x=20\Rightarrow x=20:5=4\)

9. \(\left(360-x\right):0,25=400\Rightarrow360-x=400.0,25=100\Rightarrow x=400-100=300\)

a)\(75:x+45:x=24\)
(\(75+45\))\(:x=24\)
\(120:x=24\)
\(x=120:24\)
\(x=5\)
b) X x 32 + X x 68 = 400
X x ( 32 + 68) = 400
X x 100 = 400
X = 400:100
X = 4

\(\)

a) 23 - (x + 74)= 36 + (-75)

23- ( x+74) = -39

x+74= 23 -( -39)

x+64= 62

x= 62-64

x= -2

Vậy...

2lx+9l - 68 = -24

2 |x+9| = -24+68

2| x+9|=44

|x+9| = 44:2

|x+9|= 22

TH1: x+9= -22

x= -22-9

x= -31

TH2: x+9=22

x= 22-9

x= 13

Vậy....

Trl

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