x + 50 - 40 = 50 + 100

x + 50 - 40 = 150

x + 50 = 150 + 40 = 190

x = 190 - 50 = 140

x + 50 - 40 = 50 + 50 x 2

x + 50 - 40 = 150 

x + 50 = 150 + 40 

x + 50 = 190 

x = 190 - 50 

x = 140 

ai k mik mik thề sẽ k lại hứa đó

x + 50 - 40 = 50 + 50 x 2

x + 50 - 40 = 50 x ( 1 + 2 )

x + 50 - 40 = 50 x 3

x + 50 - 40 = 150

x + 50 = 150 + 40

x + 50 = 190

x = 190 - 50

x = 140

mình nha 

\(\Rightarrow5x-4x=100\Leftrightarrow x=100\)

\(\dfrac{x}{40}-\dfrac{x}{50}=\dfrac{1}{2}\\ \Rightarrow x\left(\dfrac{1}{40}-\dfrac{1}{50}\right)=\dfrac{1}{2}\\ \Rightarrow x.\dfrac{1}{200}=\dfrac{1}{2}\\ \Rightarrow x=\dfrac{1}{2}:\dfrac{1}{200}\\ \Rightarrow x=100\)

= ( 60 + 50+40+30+20+10 ) x 2000 + 1500

= 210 x 2000 + 1500

=  420000 + 1500

= 421500

= 421500 nha bn, nhớ k mk nha

=421500

=838 nha bn

40+30+50+70+8+65+12+30+40+10+483=838

16583

Đk: \(x\ne5;x\ne-10\)

Pt: \(\Rightarrow\dfrac{\left(x-2\right)\left(x+5\right)}{x^2}-\dfrac{40}{\left(x-5\right)\left(x+10\right)}=0\)

     \(\Rightarrow\left(x-2\right)\left(x+5\right)\left(x-5\right)\left(x+10\right)-40x^2=0\)

     \(\Rightarrow\left(x^2-12x+20\right)\left(x^2-25\right)-40x^2=0\)

     \(\Rightarrow x^4-12x^3-45x^2+300x=500\)

     \(\Rightarrow\left\{{}\begin{matrix}x=5\left(loại\right)\\x=-5\left(tm\right)\end{matrix}\right.\)

60×2=120

50×2=100

40×2=80

90×2=180

100×2=200

k nha ban phamthiminhtrang de thuong

60 x 2 = 120

50 x 2 = 100

40 x 2 = 80

90 x 2 = 180

100 x 2 = 200

60*2=120

50*2=100

40*2=80

90*2=180

100*2=200

2500

2400

1000

50 x 50=2500

60x40=2400

50x20=1000

tick mk nha bạn  

2500

2400

1000