a) 10*(x-1)=15-5

10*(x-1)=10

(x-1)=10:10

(x-1)=1

x=1+1

x=2 

b) x+1+x+2+x+3=18

3x+6=18

3x=18-6

3x=12

x=12:3

x=4

c) 17+2*(x+2)=25

2*(x+2)=25-17

2*(x+2)=8

x+2=8:2

x+2=4

x=4-2

x=2

d) x:17=82-17+26

x:17=91

x=91*17

x=1547

e) 147*x=441

x=441:147

x=3

g)(x:81)=330:10:11

(x:81)=3

x=3*81

x=243

i)x+1+x+2+x+3+x+4+x+5=40

5x+15=40

5x=40-15

5x=25

x=5

Ủng hộ nha 

bạn làm sao ấy đề mink viet khac ma ban vite mot neo

thiếu bạn ak

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

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

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

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

\(\implies 650.5-175=x\)

\(\implies 3075=x\)

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

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

\(\implies x-4867=1004523\)

\(\implies x=1009390\)

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

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

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

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

\(\implies 7x=56\)

\(\implies x=8\)

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

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

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

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

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

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

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

\(\implies 5x=-420\)

\(\implies x=-84\)

~ Hok tốt a~

ai nua cac ban

ban nao biet thi minh h

882:(2x-15)=18

2x-15=882:18

2x-15=49

2x=49+15

2x=64

x=32

k mk nha

mk nhanh nhất

882;(2.x-15)=18

2.x-15=822:18=49

2.x=49+15=64

x=64:2=32

 X : (882 - 490 +98 ) = 10

X : 490 = 10

X = 10 x 490

X = 9400

= 49 mới đúng

           =(882-490+98):x=10

           =490:x=10

                    x=490:10

                    x=49

Sửa đề: 36*117-36*43-72*30

=36(117-43-60)

=36*14=504

Trả lời

1)17-2(2x-3)=3

        2(2x-3)=17-3

        2(2x-3)=14

           2x-3 =14:2

           2x-3 =7

           2x     =7+3

           2x     =10

            x      =10:2

           x       =5

1) 17 - 2(2x - 3) = 3

=> 17 - 4x + 6 = 3

=>  23 - 4x = 3

=> 4x = 23 - 3

=> 4x = 20

=> x = 20 : 4 = 5

2) 125  - 5(3x - 1) = 25

=> 125 - 15x + 5 = 25

=> 130 - 15x = 25

=> 15x = 130 - 25

=> 15x = 105

=> x = 105 : 15

=> x = 7

3) 70 - 5(2x - 3) = 45

=> 70 - 10x + 15 = 45

=> 85 - 10x = 45

=> 10x = 85 - 45

=> 10x = 40

=> x = 40 : 10

=> x = 4

4) 231 - (x - 6) = 133 : 13

=> 231 - x + 6 = 133/13

=> 237 - x = 133/13

=> x = 237 - 133/13

=> x = 2948/13

\(1,17-2\left(2x-3\right)=3\)

\(\Rightarrow17-4x+6=3\)

\(\Rightarrow4x=20\Leftrightarrow x=5\)

\(2,125-5\left(3x-1\right)=25\)

\(\Rightarrow125-15x-5=25\)

\(\Rightarrow15x=95\Rightarrow x=3,8\)

\(3,70-5\left(2x-3\right)=45\)

\(\Rightarrow70-10x+15=45\)

\(\Rightarrow10x=45\Leftrightarrow x=4,5\)

\(4,231-\left(x-6\right)=\frac{133}{13}\)

\(\Rightarrow231-\frac{133}{13}=x-6\)

\(\Rightarrow x=237-\frac{133}{13}=\frac{2821}{13}\)

1700:9/8

1700:9/8

a/ 9,532;  b/ 26,851 ;     c/  64,6618    ;      d/ 24,5

a: =22+25,5=47,5

b: =-9,207-1,505+3,8-2,8=1-10,712=-9,712

c: \(=2,07+3,005-12,005+4,23=6,3-9=-2,7\)

e: =3,58(24,45+75,55)=3,58*100=358