Question

257-(3x+25)=157

x-140:35=270

23-(x:13)=18

9(x+5)-13=671

9(4x)-13=24

(x-5)-34:17=1

.(2x-7). 3=3 dấu chấm là nhân nhé 

(3x-5):2=4.5 

9.(x+3)-20=5+4.5

70-(2x-50)=0

8.5-(x+7)=3.10

17-(x:12)=17

32.9-8x=100.2

9.(x+5)-13=671

5.(x+5)-2.24=2.26

4.(x+1)-28=3.4

giúp mk mk tích cho 

 

Answer 1

\(257-\left(3x+25\right)=157\)

\(3x+25=257-157\)

\(3x+25=100\)

\(3x=75\)

\(x=25\)

vay \(x=25\)

\(x-140:35=270\)

\(x-4=270\)

\(x=274\)

vay \(x=274\)

\(23-\left(x:13\right)=18\)

\(\frac{x}{13}=5\)

\(\frac{x}{13}=\frac{65}{13}\)

\(\Rightarrow x=65\)

vay \(x=65\)

\(9\left(x+5\right)-13=671\)

\(9x+45=684\)

\(9x=639\)

\(x=71\)

vay \(x=71\)

\(9\left(4x\right)-13=24\)

\(36x=37\)

\(x=\frac{37}{36}\)

vay \(x=\frac{37}{36}\)

\(\left(x-5\right)-34:17=1\)

\(\left(x-5\right)-2=1\)

\(x-5=3\)

\(x=8\)

vay \(x=8\)

\(\left(2x-7\right).3=3\)

\(2x-7=1\)

\(2x=8\)

\(x=4\)

vay \(x=4\)

\(\left(3x-5\right):2=4.5\)

\(\left(3x-5\right):2=20\)

\(3x-5=10\)

\(3x=15\)

\(x=5\)

vay \(x=5\)

con lai lam tuong tu 

mk moi tay roi nen ban tu lam vay

Answer 2

bạn làm tiếp thì mk đánh 2 tích nữa 

Answer 3

cảm ơn bạn giúp mk 

Answer 4

9.(x+3)-20=5+4.5

9.(x+3)-20=5+20

9.(x+3)-20=25

9.(x+3)=25+20

9.(x+3)=45

    x+3=45:9

    X+3=5

     x =5-3

    X=2

Vậy X=2

   

Answer 5

16+25+(-7)+(-25)

-20.17-(-4).5.7

45-5.(17+9)-17.(-15)

2012.(-6+4)-69.2012

10:(-5)-(-40):10

4.(-13).(-0,25).3

123-(-25-48)-[123-(-25-48)]

-1,25 năm mũ bảy :năm mũ sáu .(-8) 

làm giúp mk với Ạ huhu em cần gấp