Question

tìm x biết :

a>  15-10*(x-1)=5

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

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

d> x:17+26=82-17

e> (117+30)*x=882:2

g> 11*(x:81) =330:10 

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

 

 

Answer 1

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 

Answer 2

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

Answer 3

thiếu bạn ak