ai tra loi dc toi k luon

=4.266020909*10^11

( -7 ) - ( -14 ) = -7 + 14 = 7

78 + ( -123 ) = -45

23 + ( -13 ) = 23 - 13 = 10

| -18 | + ( -12 ) = 18 - 12 = 6

17 + | -33 | = 17 + 33 = 50

| -3 | + | 5 | = 3 + 5 = 8

| -37 | + ( -| 15 | ) = 37 - 15 = 22

( -| -32 | ) + | 5 | = -32 + 5 = -27

( -| -22 | ) + ( -| 16 | ) = -22 - 16 = -38

(-7)-(-14)=-7+14=7

78+(-123)=78-123=-45

23+(-13)=23-13=10

/-18/+(-12)=18-12=6

17+/-33/=17+33=50

/-3/+/5/=3+5=8

/-37/+(-/15/)=37-15=22

(-/-32/) +/5/= -32+5=-27

(-/-22/) +(-/16/)=-22-16=-38

Mình nhanh nhất nè 

\(4-3x⋮x-3\)

\(-3x+9-5⋮x-3\)

\(-3\left(x-3\right)-5⋮x-3\)

Vì \(-3\left(x-3\right)⋮x-3\)

\(\Rightarrow-5⋮x-3\)

\(\Rightarrow x-3\inƯ\left(-5\right)=\left\{1;5;-1;-5\right\}\)

\(\Rightarrow x\in\left\{4;8;2;-2\right\}\)

Vậy.......

(2x+3) . 5^2=5^4

2x+3 = 5^4 : 5^2

2x+3 = 5^2

2x+3 =25

2x = 25-3

2x=22

x=22:2

vậy x = 11

a) \(\left(2x+3\right)\cdot5^2=5^4\)

\(2x+3=5^2=25\)

\(2x=22\)

\(x=11\)

b) \(\left(32-2x\right)\cdot2=2^3\)

\(32-2x=2^2=4\)

\(2x=28\)

\(x=14\)

\(A=1000-\left|x+5\right|\)

có : 

\(\left|x+5\right|\ge0\)

\(\Rightarrow-\left|x+5\right|\le0\)

\(\Rightarrow1000-\left|x+5\right|\le0\)

\(\Rightarrow Max_A=1000\)

dấu "=" xảy ra khi |x + 5| = 0

=> x + 5 = 0

=> x = -5

vậy Max A = 1000 khi x = -5

65 + [(-38) + (-65)] - [12 - (-42)]

= 65 - 38 - 65 - 12 - 42

= (65 - 65) - (38 + 42) - 12

= 0 - 80 - 12

= -92

65 + [(-38) + (-65)] - [12 - (-42)]

= 65 - 38 - 65 - 12 - 42

= (65 - 65) - (38 + 42) - 12

= 0 - 80 - 12

= -92

ko bn,bn co chep nham bai ko??????????????????

\(42-2\left(3x-2^{x+1}\right)=10\)

\(2\left(32-2^{x+1}\right)=32\)

\(32-2^{x+1}=16\)

\(2^{x+1}=16\)

\(2^{x+1}=2^4\)

\(\Rightarrow x+1=4\)

\(\Rightarrow x=3\)

Vậy x = 3

[x+3]=65.=>[x+3]=65 hay [x+3=-65                                                                                                                                                                      neu [x+3=65].x+3=65-3.x=62                                                                                                                                                                                neu [x+3]=-65.x+3=(-65)-3=-68.vay x =62 hoac x = -68

trả lời:

thuộc bài hát Gọi đò

tk nhé bn

-12(x - 5) = 7(2 + 2x)

=> -12x + 60 = 14 + 14x

=> -12x - 14x = 14 - 60

=> -26x = -46

=> x = -46 : (-26)

=> x = 23/13

-12(x - 5) = 7(2 + 2x)

=> -12x + 60 = 14 + 14x

=> -12x - 14x = 14 - 60

=> -26x = -46

=> x = -46 : (-26)

=> x = 23/13