a,x-77-(-73)=34

x-77        =34+(-73)

x-77        =-39

x             =(-39)+77

x             =38

b,25-(x+8)-25=46

25-(X+8)       =46-25

25-(x+8)        =21

x+8               =25-21

x+8               =4

x                   =4-8

x                    =-4

b)-3.!x-3!=-27

!x-1!=-27/-3

!x-1!=9

x-1=+-9

TH1 TH2

x-1=9 x-1=-9

x=9+1 x=-9+1

x=10 x=-8

a, = 34.16 - 34.44 + 44.34 - 44.16

= 16.(34 - 44 ) + 44 .( 34 - 34 )

= 16.(-10) + 44.0

= -160

b, ! x-1 ! = -27 : (-3)

! x-1 ! = 9

TH1 : x-1=9 => x= 10

TH2 : x-1 = -9 => x = -8

c,x-(20-16)=34-(10+x)

=> x-4=34-10+x

 x-4=24+x

x+x=24-4

2x=20

x=20:2

x=10

vậy x=10

X x 2 +16 =96

X x 2  = 80

       x  = 80 : 2

       x = 40

 7 x X - 50 = 34

 7 x X  = 84

        x = 84 :  7 

       x = 12

Tìm X

a) X x 2 +16 =96

X x 2 = 96 - 16

X x 2 = 80

X = 80 : 2

X = 40

b) 7 x X - 50 = 34

7 x X = 34 + 50

7 x X = 84

X = 84 : 7

X = 12

HOK TỐT

câu1:160

câu2:12

a,91-5(5+x)=61

=>25+5x=91-61=30

=>5x=30-25=5

=>x=1

b,\([\left(x+34\right)-50]\)x2=56

=>(x+34)-50=56:2=28

=>x+34=28+50=78

=>x=78-34=44.

c,1045-\([2015-\left(3x-24\right)]\)=5

=>2015-(3x-24)=1045-5=1040

=>3x-24=2015-1040=975

=>3x=975+24=999

=>x=999:3=333

d,\([195-\left(3x-27\right)]\)x39=4212

=>195-(3x-27)=4212:39=108

=>3x-27=195-108=87

=>3x=87+27=117

=>x=39

e,30-3(x-2)=18

=>30-3x+6=18

=>30-3x=18-6=12

=>3x=30-12=18

=>x=18:3=6

a) \(...\Rightarrow5\left(5+x\right)=91-61=30\)

\(\Rightarrow\left(5+x\right)=30:5=6\Rightarrow x=6-5=1\)

b) \(...\Rightarrow\left(x+34\right)-50=56:2=28\)

\(\Rightarrow\left(x+34\right)=28+50=78\Rightarrow x=78-34=44\)

c) \(...\Rightarrow2015-\left(3x-24\right)=1045-5=1040\)

\(\Rightarrow\left(3x-24\right)=2015-1040=975\)

\(\Rightarrow3x=975+24=999\Rightarrow x=999:3=333\)

d) \(...\Rightarrow195-\left(3x-27\right)=4212:39=108\)

\(\Rightarrow\left(3x-27\right)=195-108=87\)

\(\Rightarrow3x=87+27=114\Rightarrow x=114:3=38\)

e) \(...\Rightarrow3\left(x-2\right)=30-18=12\Rightarrow x-2=12:3=4\)

\(\Rightarrow x=4+2=6\)

\(1,x.34-x.10=240\)

\(\Rightarrow x.\left(34-10\right)=240\)

\(\Rightarrow x.24=240\)

\(\Rightarrow x=240:24=10\)

\(2,4^{x+1}=16\)

\(\Rightarrow4^{x+1}=4^2\)

\(\Rightarrow x+1=2\Rightarrow x=1\)

\(3,\left(x+1\right)^3=27=3^3\)

\(\Rightarrow x+1=3\Rightarrow x=2\)

 1.x=10 nha bạn

 2.x=1 nha

3.x=2 đó

32 x 27 + 148 x 34 + 16 x 94

= ( 32 x 27 + 16 x 94 ) + 74 * 2 * 34

= 32 ( 27 + 47 ) + 74 x 68

= 32 x 74 + 74 x 68

= ( 32 + 68 ) x 74

= 100 * 74

= 7400

\(\frac{2017\cdot2013-2017}{4034\cdot1006+2007}\)

\(=\frac{2017\cdot\left(2013-1\right)}{2017\cdot\left(2012+1\right)}\)

\(=\frac{2012}{2013}\)

a, 32×27+148×34+16×94

=32×27+74×2×34+16×2×47

=32×27+74×68+32×47

=32×(27+47)+74×68

=32×74+74×68

=74×(32+68)

=72×100

=7200

b, 2017×2013-2017 / 4034×1006+2017

=2017×(2013-1) / 2017×2×1006+2017

=2017×2012 / 2017×2012+2017

=1/2017

\(a.\left[\left(x+34\right)-50\right].2=56\\ \Leftrightarrow\left(x+34\right)-50=28\\ \Leftrightarrow x+34=78\\ \Rightarrow x=44\)

\(b.1045-\left[215-\left(3x-24\right)\right]=5\\ \Leftrightarrow215-\left(3x-24\right)=1040\\ \Leftrightarrow3x-24=-825\\ \Leftrightarrow3x=-801\\ \Rightarrow x=-267\)

\(c.\left[195-\left(15x-27\right)\right].39=4212\\ \Leftrightarrow195-\left(15x-27\right)=108\\ \Leftrightarrow15x-27=87\\ \Leftrightarrow15x=114\\ \Rightarrow x=7,6\)

a) [(x+34)] - 50] . 2 = 56

=x+34-50=56:2

=> x+34-50=28

->x=28+50-34

-> x=44

b,1045 - [ 215 - ( 3x - 24 )] = 5

1045-(215-3x+24)=5

1045-215+3x-24=5

1045-215-24-5=-3x

-> 801=-3x-> x=801:(-3)=-267

,c) [ 195 - ( 15x - 27)] . 39 = 4212

(195-15x+27).39=4212

(195-15x+27)=4212/39=108

195+27-108=15x

114=15x-> x=114/15=7,6

-

a) [(x+34)] - 50] . 2 = 56

(x+34)] - 50=56:2

(x+34)] - 50=28

(x+34)=28+50

x+34=78

x=78-34

x=44

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