Question

a+a=10

b+b=12

c+c=20

a+b+c=?

Answer 1

`a+a = 10`

`2 xx a = 10`

`a = 10 : 2`

`a = 5`

`b + b = 12`

`2 xx b = 12`

`b = 12 :2`

`b=6`

`c + c =20`

`2 xx c = 20`

`c = 20:2`

`c = 10`

`-> a+b+c=5+6+10=21`

Answer 2

a + a = 10

=> a = 5

b + b = 12

=> b = 6

c + c = 20

=> c = 10

a + b + c = 5 + 6 + 10

= 21

Answer 3

 

Answer 4

4+6+8+...+118+120 tính nhanh giúp mình nha╭∩╮( •̀_•́ )╭∩╮

Answer 5

a + a = 10

=> a = 5

b + b = 12

=> b = 6

c + c = 20

=> c = 10

a + b + c = 5 + 6 + 10

= 21

Answer 6

10:2=5

12:2=6

20:2=10

a+b+c=5+6+10=21

Answer 7

a+a=10

=>a=10:2=5

b+b=12

=>b=12:2=6

c+c=20

=>c=20:2=10

Vậy a+b+c=5+6+10=21

Answer 8

a = 5

b = 6

c = 10

Vậy a + b + c 

= 5 + 6 + 10 = 21

Đáp án 21

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