x  + 80 = 90 + 80 + 60

x + 80 = 230

        x = 230 - 80

         x = 150

Vậy x = 150

x+80=230

x=230-80 

x=150

x + 80 = 230

x= 230 - 80

x = 150

k  nha 

20 + 60 + 50 + 80 + 90 + 10 + 50 + 60 x 10

= (20 + 80) + (50 + 50 ) + (90 + 10 ) + 600 + 60

=     100     +      100     +      100     + 660

=              960

=(20+80)+(50+50)+(90+10)+(60*10)+60

=100+100+100+600+60

=960

20 + 60 + 50 + 80 + 90 + 10 + 50 + 60 x 10

= 20 + 60 + 50 + 80 + 90 + 10 + 50 + 600

= ( 20 + 80 ) + ( 50 + 50 ) + ( 90 + 10 ) + 60 + 600

= 100 + 100 + 100 + 60 + 600

= 100 . 3 + 660

= 300 + 660

= 960

\(60=2^2\cdot3\cdot5\)

\(80=2^4\cdot5\)

\(100=2^2\cdot5^2\)

\(ƯCLN\left(60;80;100\right)=2^2\cdot5=20\)

\(BCNN\left(60;80;100\right)=2^4\cdot3\cdot5^2=16\cdot3\cdot25=400\cdot3=1200\)

\(60=2^2.3.5\)

\(80=2^4.5\)

\(100=2^2.5^2\)

\(ƯCLN=2^2.5=20\)

\(BCNN=2^4.3.5^2=1200\)

a. … = 80 : (4 x 10)

= 80 : 4 : 10

= 20 : 10 = 2

b. … = 150 : (10 x 5)

= 150 : 10 : 5

= 15 : 5 = 3

c. … = 80 : (8 x 2)

= 80 : 8 : 2

= 10 : 2 = 5

x+60=70+80

x+60=150

x=150-60

x=90

x + 60 = 70 + 80

x + 60 = 150

x         = 150 - 60

x          = 90

x + 60 = 70 + 80 

x + 60 = 150

x= 150 - 60 

x = 90

x + 60 = 30 + 80

x + 60 = 110

x         = 110 - 60

x         = 50

x + 60 = 30 + 80

x + 60 = 110

x = 110 - 60

x = 50

k nhé 

x + 60 = 30 + 80

x + 60 = 110

       x  = 110 - 60

       x  = 50

\(60x=80x-5\)
\(60x-80x=-5\)
\(-20x=-5\)
\(x=\dfrac{-5}{-20}=\dfrac{1}{4}\)

Bài này có thật à lmao

Mà ý của bài này là \(\dfrac{x+1}{90}\)+\(\dfrac{x+2}{80}\)+\(\dfrac{x+3}{70}\)+\(\dfrac{x+4}{60}\)phải không🤔

x + 80 = 60 + 30

x + 80 = 90

x = 90 - 80

x = 10

K mk nha

x+80=60+30

x+80=90

x=90-80

x=10

vậy x=10.

x + 80 = 60 + 30

x + 80 = 90

       x  = 90 - 80

       x = 10

tk mk mk tk lại