1. This CD player is very small. It’s portable.
x+19+11=0
x+19=-11
x=-30
2x+3.5=4.7
2x+15=28
2x=28-15=13
x=13:2=13/2
12+x=-18+5=-13
x=-13+(-12)
x=-25
nó bị lang bay mất r
B
1760 - 1762.