(x-5)(x-7)=0

=> x-5=0     hoặc x-7=0

=> x=5        hoặc x=7

541+(218-x)=735

=> 218-x=735-541

=> 218-x=194

=> x=218-194

=> x=24

96-3(x+1)=42

=>3(x+1)=96-42

=>3(x+1)=54

=>x+1=54:3

=>x+1=18

=>x=18-1

=>x=17

(x-47)-115=0

=>x-47=0+115

=>x-47=115

=>x=115+47

=>x=162

(x-36):18=12

=>x-36=12.18

=>x-36=216

=>x=216+36

=>x=252

(x-5).(x-7)=0

x-5=0+7

x=7+5

x=12

541+(218-x)=735

218-x=735-541

x=218-196

x=12

96-3(x+1)=42

3(x+1)=96-42

x+1=54:3

x=17-1

x=16

(x-47)-115=0

x-47=0+115

x=115+47

x=162

(x-36):12=18

x-36=12*18

x-36=216

x=216+36

x=252

X=252 nha bạn Anh Anh nhớ tk mình và kb nha

a)541 + (218 - x) = 735

(218 - x) = 735 - 541

(218 - x) = 194

x = 218 - 194

x = 24

541 + (218 – x) = 735

    218 – x = 735 – 541

    218 - x = 194

    x = 218 – 194

a, 541 + ( 218 - x ) = 735

=> 218 - x = 735 - 541

=> 218 - x = 194

=> x = 218 - 194

=> x = 24

Vậy x = 24

b, 96 - 3.( x + 1 ) = 42

=> 3.( x + 1 ) = 96 - 42

=> 3.( x + 1 ) = 54

=> x + 1 = 54 : 3

=> x + 1 = 18

=> x = 18 - 1

=> x = 17

Vậy x = 17

c, ( x - 36 ) : 18 = 12

=> x - 36 = 12.18

=> x - 36 = 216

=> x = 216 + 36

=> x = 252

Vậy x = 252

d, 3^x + 3^x+1 + 3^x+2 = 13.81

=> 3^x.1 + 3^x.3 + 3^x.3²= 13.81

=> 3^x.( 1 + 3 + 3² ) = 13.81

=> 3^x.( 1 + 3 + 9 ) = 13.81

=> 3^x.13 = 13.81

=> 3^x= 13.81:13

=> 3^x= 81

=> 3^x = 3⁴

=> x = 4

Vậy x = 4

a)x+(-5)=-18

x=(-18)-(-5)

x=-13

541 +(218 - x)=235

218-x =235 - 541

218 - x=-306

x=218-(-306)

x=524

a) 23

b) -88

a) x$x$ + (-5) = -18 

    x           = (-18) - (-5)

    x           = -13

b) 541 + ( 218 - x$x$) = 235.

                 218 - x  = 235 - 541

                 218 - x  = -306

                           x  = 218 - (-306) 
                           x  = 218 + 306

                           x  = 524

a) Ta có: 541 + (218-x) = 735

=> 218 -x = 735 - 541

=> 218 - x =     194

=>      x = 218 - 194

=>x     =        16

b;c làm tưởng tự

\(a,5x-16=40-1\)

<=>\(5x=40-1+16\)

<=>\(5x=55\)

<=>\(x=11\)

\(b,x-10=-25\)

<=>\(x=\left(-25\right)-10\)

<=>\(x=-35\)

\(c,-12+x=-30\)

<=>\(x=\left(-30\right)+12\)

<=>\(x=-18\)

a) 5x-16=40-1

5x-16=39

5x=39+16

5x=55

x=55:5

x=11

b)x-10=(-25)

x=(-25)+10

x=(-15)

c) -12+x= -30

           x= -30-(-12)

           x= -30+12

           x= -18

d) 2x +12 = -40+ 6

2x+12=(-34)

2x=(-34)-12

2x=(-46)

x=(-46):2

x=(-23)

e)125:(3x-13)=25

3x-13=125:25

3x-13=5

3x=5+13

3x=18

x=18:3

x=6

f)541+(218-x)=735

218-x=735-541

218-x=194

x=218-194

x=  24

g) 3(2x+1)-19=14

3(2x+1)=14+19

3(2x+1)=33

2x+1=33:3

2x+1=11

2x=11-1

2x=10

x=10:2

x=5

h)175-5(x+3)=85

5(x+3)=175-85

5(x+3)=90

x+3=90:5

x+3=18

x=18-3

x=15

i)8x+(-3)=39

8x=39-(-3)

8x=42

x=42:8

x=42/8

L)2x+4x=36+(-6)

6x=30

x=30:6

x=5

a) 125⁴:25³= (5³)³: (5²)³=5⁹:5⁶=5³

b) 4¹⁴:5²⁸=4¹⁴: 5^2.14=4¹⁴:(5²)¹⁴= 4¹⁴:25¹⁴

c) 12ⁿ:2²ⁿ=