\(1) 420+65.4=(x+175):5+30\)

\(\implies 420+260=(x+175):5+30\)

\(\implies 680=(x+175):5+30\)

\(\implies 650=(x+175):5\)

\(\implies 650.5-175=x\)

\(\implies 3075=x\)

\(2)x-4867=(175.2050.70):25+23\)

\(\implies x-4867=1004500+23\)

\(\implies x-4867=1004523\)

\(\implies x=1009390\)

\(3) 134-[(96-7x):4-2]=126\)

\(\implies (96-7x):4-2=8\)

\(\implies(96-7x):4=10\)

\(\implies 96-7x=40\)

\(\implies 7x=56\)

\(\implies x=8\)

\(4) 4-\{100-[(100-5x):8-5]:10\}:25=0\)

\(\implies 4-\{100-[(100-5x):8-5]:10\}=0\)

\(\implies 100-[(100-5x):8-5]:10=4\)

\(\implies 100-[(100-5x):8-5]=40\)

\(\implies (100-5x):8-5=60\)

\(\implies (100-5x):8=65\)

\(\implies 100-5x=520\)

\(\implies 5x=-420\)

\(\implies x=-84\)

~ Hok tốt a~

ai nua cac ban

ban nao biet thi minh h

b, 12 . (134-x)-126=54

=> 12 . (134-x)=54+126=180

=> 134-x=180:12=15

=> x=134-15=119

vậy x=119

c, (4^x +3)³ = 64

ta có: 4³ = 64

=> 4^x+3=4

=> 4^x =4-3=1

=> x=0

vậy x=0

phần a không biết đề sai hay thế nào mà t tính không ra kết quả

a) (3227+3^x).15=270

3227+3^x = 270:15

3227+3^x = 18

3^x = 18-3227

3^x = -3209

Từ đây có thể kết luận rằng x vô hợp lý

b) 12.(134-x)-126 = 54

12(134-x) = 54+126

12(134-x) = 180

134-x = 180:12

134-x = 15

x = 134-15

x = 119

c) (4^x+3)³ = 64

<=> 4^x+3 = 4

4^x = 4-3

4^x = 1

=> x = 0

134 x 100 + 250 x 100 - 84 x 100

= (134 + 250 - 84 ) x 100

= ( 384 - 84 0 x 100

= 300 x 100

= 30000

a, 13104

b,134*100+250*100-84*100=100*(134+250-84)=100*300=30000

134*100+250x100-84x100

=100x(134+250-84)

=100x300

=30000

bài khó thế bạn

\(a,x-4702=9198\)

<=>\(x=9198+4702\)

<=>\(x=13900\)

\(b,485126+x=854609\)

<=>\(x=854609-485126\)

<=>\(x=369483\)

\(c,x+37206=108927\)

<=>\(x=108927-37206\)

<=>\(x=71721\)

\(d,780134-x=89476\)

<=>\(x=780134-89476\)

<=>\(x=690658\)

a) x – 4702 = 9198   

                x = 9198 + 4702

                x = 13900                                           

c) x + 37206 = 108 927

                  x = 108927 - 37206

                  x = 71721
b) 485 126 + x = 854 609

                     x = 854609 - 485126

                     x = 369483                                     

d) 780 134 – x = 89 476

                     x = 780134 - 89476

                     x = 690658

a) 126 x 4 + 126 x 5 + 126

= 126 x 4 + 126 x 5 + 126 x 1

= 126 x ( 4 + 5 + 1 )

= 126 x 10

= 1260

b) 184 x 100 - 50 x 100

= ( 184 - 50 ) x 100

= 134 x 100

= 13400

126 x 4 + 126 x 5 + 126

= 126 x ( 4 + 5 + 1 )

= 126 x 10

= 1260

134 x 4 x 5

= 134 x ( 4x 5 )

= 134 x ( 2 x 10 )

= 134 x 2 x 10

= 268 x 10

=  2680

k mình nhá

134 x 4 x 5 = 2680

134x4x5=2680

Ai k hộ mink mink biết ơn

\(...\Rightarrow x=\dfrac{17}{5}:134=\dfrac{17}{5}\dfrac{1}{134}=\dfrac{17}{670}\)

\(\dfrac{17}{5}:x=134\\ \Rightarrow x=\dfrac{17}{5}:134\\ \Rightarrow x=\dfrac{17}{670}\)

134 - 5. ( x + 4 ) = 34

        5 . ( x + 4 ) = 134 - 34

        5 . ( x + 4 ) = 100

             ( x + 4 ) = 100: 5

             ( x + 4 ) = 20

               x        = 20 - 4

               x        = 16

134 - 5(x+4) = 34 

=> 134 - 5x - 20 = 34 

=> 114 - 5x = 34 

=> 5x = 114 - 34 

=> 5x = 80

=> x= 16

5(x+4) = 134-34

5(x+4) = 100

(x+4)   = 100 : 5

x+4    = 20

x       = 20-4

x      = 16