x+10=20+40

x+10=60

x=50

k nha

X+10=20+40

X+10=60

X=60-10

X=50

x + 10 = 20 + 40

x + 10 = 60

x = 60 - 10

x = 50 

20

40

60

80

100

120

kb minh nha

10+10=20

20+20=40

30+30=60

40+40=80

50+50=100

60+60=120

10 + 10 = 20

20 + 20 = 40

30 + 30 = 60

40 + 40 = 80

50 + 50 = 100

60 + 60 = 120

(40 + 60) . 2

= 100 . 2

= 200

ai k mk, mk k lại

( 40 + 60 ) . 2 

= 100 . 2

= 200

( 40 + 60 ) .2

= 100 . 2

= 200

x+20=40

x=40-20

x=20

x+20=40

x=40-20

x=20

k mk nhe

cam on nhiu

x + 20 = 40

        x = 40 - 20

        x = 20               ai k mk,mk k lại

X+20=40

X=40-20

X=20

Vaayj X=20

tk mk ddi mk tk rui do

x + 20 = 50 + 40

x + 20 = 90

x = 90 - 20

x = 70 

x + 20 = 50 + 40

x + 20 = 90

        x = 90 - 20

        x = 70

k mk nha~~

x  +  20  =  50  +  40

x  +  20  =     90

         x  =   90  -  20

         x  =       70

Bn k mk nhé !

x + 30 = 40 x 2

 x + 30 = 80

          x = 80 - 30

          x = 50

x + 30 = 40 x 2

x + 30 = 80

x = 80 - 30

x = 50 

x+30=40x2

x+30=80

x=80-30=50

x=50

x + 90 + 10 = 100 - 40

x + 100 = 100 - 40

x + 100 = 60

x = 60 - 100

x = -40

x+90+10=100-40

x+100=100-40

x+100=60

x=60-100

x=-40

x+90+10=100-40

x=-40

mik kik bạn nhé, bạn kik lại mik

105

ai k mk mk k lại

bk tự trả lời à ?!

105

k mình nha

5 + 5 + 10 + 10 + 5 = 35

5 + 5 + 10 + 10 + 5 = 35

k mk mk k lại

5+5+10+10+5=35