6:=(3/2)*(3/2)^2*(3/2)^4=(3/2)^7

7: =(1/2)^7*2^3*2^5*2^8=2^9

8: =(-1/7)^4*5^4=(-5/7)^4

9: =2^2*2^5:(2^3/2^4)

=2^7/2=2^6

10: =(1/7)^3*7^2=1/7

a) \(47.69-31\left(-47\right)=47-69-\left(-31\right).47\)

\(=47.69+31.47=47.\left(69+31\right)=47.100=4700\)

b) \(16\left(38-2\right)-38\left(16-1\right)=16.38-16.2-38.16-\left(-38\right).1\)

\(=\left(16.38-38.16\right)-32+38=0-32+38=6\)

c) \(\left(-41\right)\left(59-2\right)+59\left(41-2\right)\) \(=\left(-41\right).59-\left[\left(-41\right).2\right]+59.41-59.2\)

\(=\left[\left(-41\right).59+59.41\right]-\left[\left(-49\right).2-51.2\right]=0-\left(-100\right).2=200\)

d) \(125.\left(-8\right)\left(-25\right)9.4.1000\div3=125.200.9.4.1000\div3\)

\(=\left(125.4\right)\left(9\div3\right)\left(200.1000\right)=500.3.200000=300000000\)

a) \(-524\cdot\left[23+\left(-45\right)\right]+524\cdot\left(-45+123\right)\)

\(=-524\cdot\left[\left(23-45\right)-\left(-45+123\right)\right]\)

\(=-524\cdot\left(23-45+45-123\right)\)

\(=-524\cdot-100\)

\(=52400\)

b) \(47\cdot69-31\cdot\left(-47\right)\)

\(=-47\cdot\left(-69-31\right)\)

\(=-47\cdot-100\)

\(=4700\)

c) \(16\left(38-2\right)-38\left(16-1\right)\)

\(=16\cdot38-16\cdot2-38\cdot16+38\)

\(=-16\cdot2+38\)

\(=-36+38\)

\(=2\)

d) \(\left(-41\right)\cdot\left(59+2\right)+59\cdot\left(41-2\right)\)

\(=-41\cdot59-41\cdot2+41\cdot59-2\cdot59\)

\(=-41\cdot2-2\cdot59\)

\(=-2\left(41+59\right)\)

\(=-2\cdot100\)

\(=-200\)

e) \(25\cdot\left(-8\right)\cdot\left(-25\right)\cdot9\cdot4\cdot100^0:3\)

\(=\left(-1000\right)\cdot\left(-25\right)\cdot9\cdot4\cdot1:3\)

\(=25000\cdot9\cdot4:3\)

\(=25000\cdot3\cdot4\)

\(=100000\cdot3\)

\(=300000\)

a)47.69-31.(-47)

=(47-47).69-31

=0.69-31

=690-31

=659

a. 47.69 - 31 .(-47)

=47 . 69 - (-31) .47

=47 . (69+31)

=47 . 100 = 4700

\(8^{59}:16^{32}=2^{177}:2^{128}=2^{49}\)

a: \(\left[\left(-59\right)+71\right]-\left[\left(-83\right)-\left(-95\right)\right]\)

\(=\left[71-59\right]-\left[-83+95\right]\)
=12-12

=0

b: \(\left(435-167-89\right)-\left(435-89\right)\)

\(=435-167-89-435+89\)

\(=\left(435-435\right)+\left(89-89\right)-167\)

=0+0-167

=-167

c: \(\left(-624\right)-\left[\left(376+245\right)-45\right]\)

\(=\left(-624\right)-\left[376+245-45\right]\)

\(=\left(-624\right)-376-200\)

=-1000-200

=-1200

(x - 59).16 - 8 = 120

=> (x - 59).16 = 120 + 8

=> (x - 59).16 = 128

=> x - 59 = 128 : 16

=> x - 59 = 8

=> x = 8 + 59 = 67

Vậy x = 67

[x-59].16-8=120

[x-59].16    =120+8

[x-59].16     =128

x-59            =128:16

x-59            =8

x                  =8+59

x                   =67

k cho mình nha

             Bài giải

(x - 59).16 - 8 = 120

 (x - 59).16 = 120 + 8

(x - 59).16 = 128

 x - 59 = 128 : 16

 x - 59 = 8

 x = 8 + 59 = 67

Vậy x = 67.

1a) x - 7 = -18

=> x = -18 + 7

=> x = -11

b) -2x + 8 = -24

=> -2x = -24 - 8

=> -2x = -32

=> x = -32 : (-2)

=> x = 16

c) 4 - 2x = 59

=> 2x = 4 - 59

=> 2x = -55

=> x = -55 : 2

=> x = -27,5

d) -36 - x = 59

=> x = -36 - 59

=> x = -95

k) -81 : x = (-3)

=> x = -81 : (-3)

=> x = 27

g) -16 : x = 2

=> x = -16 : 2

=> x = -8

m) (6 - 27) - (3 - x) = (-7) . (-8)

=> -21 - (3 - x) = 56

=> 3 - x = -21 - 56

=> 3 - x = -77

=>  x = 3 + 77

=> x = 80

a) x=-11

b) x=16

c) x= -27,5

d) x=95

1.73.(8-59)-59.(8-73)

=73.8-73.59-59.8-59.73

=73.(59-59)-8.(73-59)

=73.0-8.14

=0-112

=-112

2.159.(18-59)-59.(18 - 159)

=159.18-59.159-59.18-59.159

=159.(59-59)-18.(159-59)

=159.0-18.100

=0-1800

=-1800

a) \(27^{64}:81^{20}=3^{192}:3^{80}=3^{112}\)

b) \(\left(\dfrac{1}{8}\right)^{20}:\left(\dfrac{1}{16}\right)^9=\left(\dfrac{1}{2}\right)^{60}:\left(\dfrac{1}{2}\right)^{36}=\left(\dfrac{1}{2}\right)^{24}\)

c) \(\dfrac{1}{3}:\dfrac{1}{5}-\dfrac{1}{6}=\dfrac{5}{3}-\dfrac{1}{6}=\dfrac{10}{6}-\dfrac{1}{6}=\dfrac{9}{6}=\dfrac{3}{2}\)