Question

x + 90 + 10 = 900

 

Answer 1

x+(90+10) = 900

x+100       = 900

x              = 900-100

x               = 800

Answer 2

x + 90 + 10 = 900

x + 90 = 900 - 10

x + 90 = 890

x = 890 - 90

x = 800

Answer 3

x+90+10=900

    x+90=900-10

    x+90=880

         x=800-90

          x=710

Answer 4

x+90+10=900

x=900-10-90

x=890-90

x=800

nha

Answer 5

x=800

 

Answer 6

900-(10+90)=800

Đáp số: 800

k cho mik nha

Answer 7

x=800

chắc chắn 100/100 luôn!