Question

Gỡ điểm ko?

10+8+9++20=x+30

nhanh ha!

Answer 1

10+8+9+20=x+30

47=x+30

47-30=x

17=x

Answer 2

10+8+9++20=x+30

=10+8+9+20=x+30

=>x+30=47

=>x=47-30

=>x=17

Answer 3

10+8+9++20=x+30

=10+8+9+20=x+30

=>x+30=47

=>x=47-30

=>x=17

Answer 4

10+8+9++20=x+30

=10+8+9+20=x+30

=>x+30=47

=>x=47-30

=>x=17

Answer 5

10+8+9+20=x+30

x+30=47

x+17

Answer 6

10+9+8+20=x+30

x+30=47

x=17

Answer 7

10+8+9+20+20=x+30

=>10+8+9+20=x+30

=>x+30=47

=>x=47-30

=>x=17